1
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Chen PH, Hsu SJ, Chen CC, Fu JC, Hou DR. Synthesis of Diarylamines via Nitrosonium-Initiated C-N Bond Formation. J Org Chem 2024; 89:10316-10326. [PMID: 38950197 PMCID: PMC11267615 DOI: 10.1021/acs.joc.4c01220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 06/12/2024] [Accepted: 06/18/2024] [Indexed: 07/03/2024]
Abstract
Electron-rich diarylamines, exemplified by anisole-derived amines, play pivotal roles in process chemistry, pharmaceuticals, and materials. In this study, homo-diarylamines were synthesized directly from the C-H activation of electron-rich arenes by sodium nitrate/trifluoroacetic acid and the successive treatment of iron powder. Mechanistic investigations reveal that nitrosoarene serves as the reaction intermediate, and the formation of the second C-N bond between the resulting nitrosoarene and electron-rich arene is catalyzed by the nitrosonium ion (NO+). Thus, hetero-diarylamines were synthesized using preformed nitrosoarenes and various electron-rich arenes. This reaction complements a range of cross-coupling reactions catalyzed by transition metal catalysts.
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Affiliation(s)
| | | | - Cheng-Chun Chen
- Department of Chemistry, National Central University, 300 Jhong-Da Rd., Jhong-Li, Taoyuan 320317, Taiwan
| | - Jui-Chen Fu
- Department of Chemistry, National Central University, 300 Jhong-Da Rd., Jhong-Li, Taoyuan 320317, Taiwan
| | - Duen-Ren Hou
- Department of Chemistry, National Central University, 300 Jhong-Da Rd., Jhong-Li, Taoyuan 320317, Taiwan
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2
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Zhu M, Wang P, Wu Z, Zhong Y, Su L, Xin Y, Spokoyny AM, Zou C, Mu X. A Pd-catalyzed route to carborane-fused boron heterocycles. Chem Sci 2024; 15:10392-10401. [PMID: 38994428 PMCID: PMC11234826 DOI: 10.1039/d4sc02214a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 05/28/2024] [Indexed: 07/13/2024] Open
Abstract
Due to the expanding applications of icosahedral carboranes in medicinal and materials chemistry research, their functionalizations have become one of the central themes in boron-rich cluster chemistry. Although several strategies for incorporating nitrogen-containing nucleophiles on a single boron vertex of the icosahedral carboranes (C2B10H12) have been developed, methods for preparing clusters with vicinal B-N moieties are still lacking. The steric bulk of icosahedral carboranes and disparate electronic and steric nature of the N-containing groups have rendered the vicinal diamination challenging. In this article, we show how a developed Pd-catalyzed process is used to incorporate an array of NH-heterocycles, anilines, and heteroanilines with various electronic and steric profiles onto the vicinal boron vertices of a meta-carborane cluster via sequential or one-pot fashion. Importantly, oxidative cyclizations of the cross-coupling products with indoles and pyrroles appended to boron vertices generate a previously unknown class of all-boron-vertex bound carborane-fused six- and seven-membered ring heterocycles. Photophysical studies of the meta-carborane-fused heterocycles show that these structures can exhibit luminescence with high quantum yields and are amenable to further manipulations.
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Affiliation(s)
- Mengjie Zhu
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology 130 Meilong Road 200237 Shanghai China
| | - Puzhao Wang
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology 130 Meilong Road 200237 Shanghai China
| | - Zhengqiu Wu
- Functional Coordination Material Group-Frontier Research Center, Songshan Lake Materials Laboratory, Dongguan Dongguan 523808 Guangdong China
| | - Yangfa Zhong
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology 130 Meilong Road 200237 Shanghai China
| | - Laiman Su
- School of Biotechnology, East China University of Science and Technology 130 Meilong Road 200237 Shanghai China
| | - Yuquan Xin
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology 130 Meilong Road 200237 Shanghai China
| | - Alexander M Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles 607 Charles E. Young Drive East Los Angeles California 90095 USA
- California NanoSystems Institute (CNSI), University of California, Los Angeles Los Angeles California 90095 USA
| | - Chao Zou
- Functional Coordination Material Group-Frontier Research Center, Songshan Lake Materials Laboratory, Dongguan Dongguan 523808 Guangdong China
| | - Xin Mu
- Engineering Research Center of Pharmaceutical Process Chemistry, Ministry of Education, School of Pharmacy, East China University of Science and Technology 130 Meilong Road 200237 Shanghai China
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3
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Chen Z, Song G, Qi L, Gunasekar R, Aïssa C, Robertson C, Steiner A, Xue D, Xiao J. Reductive Transamination of Pyridinium Salts to N-Aryl Piperidines. J Org Chem 2024; 89:9352-9359. [PMID: 38872240 PMCID: PMC11232014 DOI: 10.1021/acs.joc.4c00493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 05/30/2024] [Accepted: 06/05/2024] [Indexed: 06/15/2024]
Abstract
Saturated N-heterocycles are found in numerous bioactive natural products and are prevalent in pharmaceuticals and agrochemicals. While there are many methods for their synthesis, each has its limitations, such as scope and functional group tolerance. Herein, we describe a rhodium-catalyzed transfer hydrogenation of pyridinium salts to access N-(hetero)aryl piperidines. The reaction proceeds via a reductive transamination process, involving the initial formation of a dihydropyridine intermediate via reduction of the pyridinium ion with HCOOH, which is intercepted by water and then hydrolyzed. Subsequent reductive amination with an exogenous (hetero)aryl amine affords an N-(hetero)aryl piperidine. This reductive transamination method thus allows for access of N-(hetero)aryl piperidines from readily available pyridine derivatives, expanding the toolbox of dearomatization and skeletal editing.
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Affiliation(s)
- Zhenyu Chen
- Department
of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
| | - Geyang Song
- Key
Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education
and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Leiming Qi
- Department
of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
| | | | - Christophe Aïssa
- Department
of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
| | - Craig Robertson
- Department
of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
| | - Alexander Steiner
- Department
of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
| | - Dong Xue
- Key
Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education
and School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China
| | - Jianliang Xiao
- Department
of Chemistry, University of Liverpool, Liverpool L69 7ZD, U.K.
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4
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Luo H, Yang Y, Fu Y, Yu F, Gao L, Ma Y, Li Y, Wu K, Lin L. In situ copper photocatalysts triggering halide atom transfer of unactivated alkyl halides for general C(sp3)-N couplings. Nat Commun 2024; 15:5647. [PMID: 38969653 PMCID: PMC11226431 DOI: 10.1038/s41467-024-50082-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Accepted: 06/27/2024] [Indexed: 07/07/2024] Open
Abstract
Direct reduction of unactivated alkyl halides for C(sp3)-N couplings under mild conditions presents a significant challenge in organic synthesis due to their low reduction potential. Herein, we introduce an in situ formed pyridyl-carbene-ligated copper (I) catalyst that is capable of abstracting halide atom and generating alkyl radicals for general C(sp3)-N couplings under visible light. Control experiments confirmed that the mono-pyridyl-carbene-ligated copper complex is the active species responsible for catalysis. Mechanistic investigations using transient absorption spectroscopy across multiple decades of timescales revealed ultrafast intersystem crossing (260 ps) of the photoexcited copper (I) complexes into their long-lived triplet excited states (>2 μs). The non-Stern-Volmer quenching dynamics of the triplets by unactivated alkyl halides suggests an association between copper (I) complexes and alkyl halides, thereby facilitating the abstraction of halide atoms via inner-sphere single electron transfer (SET), rather than outer-sphere SET, for the formation of alkyl radicals for subsequent cross couplings.
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Affiliation(s)
- Hang Luo
- School of Chemistry, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Yupeng Yang
- State Key Laboratory of Molecular Reaction Dynamics and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian, Dalian, Liaoning, 116023, China
| | - Yukang Fu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Fangnian Yu
- School of Chemistry, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Lei Gao
- School of Chemistry, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Yunpeng Ma
- School of Chemistry, Dalian University of Technology, Dalian, Liaoning, 116024, China
| | - Yang Li
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, 116024, China.
| | - Kaifeng Wu
- State Key Laboratory of Molecular Reaction Dynamics and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian, Dalian, Liaoning, 116023, China.
| | - Luqing Lin
- School of Chemistry, Dalian University of Technology, Dalian, Liaoning, 116024, China.
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5
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Zhou Y, Akkarasereenon K, Liu L, Lin R, Song L, Tong R. Ecofriendly Protocol for ipso-Bromination of Arylboronic Acids. Org Lett 2024; 26:5151-5156. [PMID: 38864512 DOI: 10.1021/acs.orglett.4c01570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
We report a novel and environmentally friendly method for the ipso-bromination of arylboronic acids by exploiting the oxone/KBr system. We discovered that CuBr can catalyze the reaction and increase the yield from 63 to 97%. We believe that CuBr might catalyze the in situ generation of HOBr from oxone/KBr. The mild reaction condition permits tolerance of a diverse array of functional groups with exclusive regio- and chemoselectivity and allows low-cost large-scale reaction without explosion risk.
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Affiliation(s)
- Yiqin Zhou
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong 999077, China
| | - Kornkamon Akkarasereenon
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong 999077, China
| | - Lifang Liu
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Ran Lin
- College of Bee Science and Biomedicine, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Liyan Song
- Key Laboratory of Biopesticide and Chemical Biology (Ministry of Education), College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Rongbiao Tong
- Department of Chemistry, The Hong Kong University of Science and Technology, Clearwater Bay, Kowloon, Hong Kong 999077, China
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6
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Gisbert Y, Simón Marqués P, Baccini C, Abid S, Saffon-Merceron N, Rapenne G, Kammerer C. Copper-catalysed perarylation of cyclopentadiene: synthesis of hexaarylcyclopentadienes. Chem Sci 2024; 15:9127-9137. [PMID: 38903211 PMCID: PMC11186316 DOI: 10.1039/d4sc02458c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Accepted: 05/14/2024] [Indexed: 06/22/2024] Open
Abstract
While hexaphenylsilacyclopentadiene (hexaphenylsilole) is viewed as an archetypal Aggregation-Induced Emission (AIE) luminogen, its isostructural hydrocarbon surrogate hexaphenylcyclopentadiene has strikingly never been investigated in this context, most probably due to a lack of synthetic availability. Herein, we report a straightforward synthesis of hexaphenylcyclopentadiene, via the direct perarylation of cyclopentadiene upon copper(i) catalysis under microwave activation, with the formation of six new C-C bonds in a single synthetic operation. Using zirconocene dichloride as a convenient source of cyclopentadiene and a variety of aryl iodides as coupling partners, this copper-catalysed cross-coupling reaction gave rise to a series of unprecedented hexaarylcyclopentadienes. The latter are direct precursors of extended π-conjugated polycyclic compounds, and their cyclodehydrogenation under Scholl reaction conditions yielded helicenic 17,17-diarylcyclopenta[l,l']diphenanthrenes. These structurally complex polyannelated fluorene derivatives can now be prepared in only two synthetic steps from cyclopentadiene.
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Affiliation(s)
- Yohan Gisbert
- CEMES, Université de Toulouse, CNRS 29 Rue Marvig 31055 Toulouse France
| | | | - Caterina Baccini
- CEMES, Université de Toulouse, CNRS 29 Rue Marvig 31055 Toulouse France
| | - Seifallah Abid
- CEMES, Université de Toulouse, CNRS 29 Rue Marvig 31055 Toulouse France
| | - Nathalie Saffon-Merceron
- Université de Toulouse, UPS, Institut de Chimie de Toulouse ICT UAR 2599, 118 Route de Narbonne 31062 Toulouse France
| | - Gwénaël Rapenne
- CEMES, Université de Toulouse, CNRS 29 Rue Marvig 31055 Toulouse France
- Division of Materials Science, Nara Institute of Science and Technology 8916-5 Takayama, Ikoma Nara Japan
| | - Claire Kammerer
- CEMES, Université de Toulouse, CNRS 29 Rue Marvig 31055 Toulouse France
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7
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Roychowdhury P, Waheed S, Sengupta U, Herrera RG, Powers DC. Synthesis of Secondary Amines via Self-Limiting Alkylation. Org Lett 2024; 26:4926-4931. [PMID: 38832812 PMCID: PMC11187628 DOI: 10.1021/acs.orglett.4c01430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 05/27/2024] [Accepted: 05/29/2024] [Indexed: 06/06/2024]
Abstract
N-centered nucleophilicity increases upon alkylation, and thus selective partial alkylation of ammonia and primary amines can be challenging: Poor selectivity and overalkylation are often observed. Here we introduce N-aminopyridinium salts as ammonia surrogates for the synthesis of secondary amines via self-limiting alkylation chemistry. Readily available N-aryl-N-aminopyridinium salts engage in N-alkylation and in situ depyridylation to afford secondary aryl-alkyl amines without any overalkylation products. The method overcomes classical challenges in selective amine alkylation by accomplishing alkylation via transient, highly nucleophilic pyridinium ylide intermediates and can be applied in the context of complex molecular scaffolds. These findings establish N-aminopyridinium salts as ammonia synthons in synthetic chemistry and a strategy to control the extent of amine alkylation.
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Affiliation(s)
- Pritam Roychowdhury
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Saim Waheed
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Uddalak Sengupta
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Roberto G. Herrera
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - David C. Powers
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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8
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Sato K, Teranishi S, Sakaue A, Karuo Y, Tarui A, Kawai K, Takeda H, Kinashi T, Omote M. Rhodium-catalyzed homo-coupling reaction of aryl Grignard reagents and its application for the synthesis of an integrin inhibitor. Beilstein J Org Chem 2024; 20:1341-1347. [PMID: 38887571 PMCID: PMC11181203 DOI: 10.3762/bjoc.20.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Accepted: 05/29/2024] [Indexed: 06/20/2024] Open
Abstract
A novel Rh-catalyzed one-pot homo-coupling reaction of aryl Grignard reagents was achieved. The reaction with bromobenzenes having an electron-donating group or a halogen substituent gave the corresponding homo-coupling products in good yields, although the reaction using heterocyclic or aliphatic bromides scarcely proceeded. A Rh(III)-bis(aryl) complex, which might be formed from RhCl(PPh3)3 and the aryl Grignard reagents, plays an important role in giving the homo-coupling products in this reaction. Furthermore, we applied the reaction to the synthesis of a novel inhibitor for integrins which is critical for several diseases.
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Affiliation(s)
- Kazuyuki Sato
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan
| | - Satoki Teranishi
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan
| | - Atsushi Sakaue
- Kyowa Marina Hospital, 4-15-1 Nishinomiyahama, Nishinomiya, Hyogo 662-0934, Japan
| | - Yukiko Karuo
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan
| | - Atsushi Tarui
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan
| | - Kentaro Kawai
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan
| | - Hiroyuki Takeda
- Division of Proteo-Drug-Discovery Sciences, Ehime University Proteo-Science Center
- Bunkyo-cho, Matsuyama, Ehime, 790-8577, Japan,
| | - Tatsuo Kinashi
- Department of Molecular Genetics, Institute of Biomedical Science, Kansai Medical University, 2-5-1 Shin-machi, Hirakata, Osaka, 573-1010, Japan
| | - Masaaki Omote
- Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka, 573-0101, Japan
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9
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Carson WP, Tsymbal AV, Pipal RW, Edwards GA, Martinelli JR, Cabré A, MacMillan DWC. Free-Radical Deoxygenative Amination of Alcohols via Copper Metallaphotoredox Catalysis. J Am Chem Soc 2024; 146:15681-15687. [PMID: 38813987 DOI: 10.1021/jacs.4c04477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Alcohols are among the most abundant chemical feedstocks, yet they remain vastly underutilized as coupling partners in transition metal catalysis. Herein, we describe a copper metallaphotoredox manifold for the open shell deoxygenative coupling of alcohols with N-nucleophiles to forge C(sp3)-N bonds, a linkage of high value in pharmaceutical agents that is challenging to access via conventional cross-coupling techniques. N-heterocyclic carbene (NHC)-mediated conversion of alcohols into the corresponding alkyl radicals followed by copper-catalyzed C-N coupling renders this platform successful for a broad range of structurally unbiased alcohols and 18 classes of N-nucleophiles.
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Affiliation(s)
- William P Carson
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - Artem V Tsymbal
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - Robert W Pipal
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - Grant A Edwards
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - Joseph R Martinelli
- Lilly Genetic Medicine, Eli Lilly and Company, Cambridge, Massachusetts 02142, United States
| | - Albert Cabré
- Centro de Investigación Lilly S.A., Madrid 28108, Spain
| | - David W C MacMillan
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
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10
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Talukdar V, Mondal K, Halder P, Das P. Ullmann-Type N-, S-, and O-Arylation Using a Well-Defined 7-Azaindole- N-oxide (7-AINO)-Based Copper(II) Catalyst: Scope and Application to Drug Synthesis. J Org Chem 2024; 89:7455-7471. [PMID: 38773695 DOI: 10.1021/acs.joc.3c02852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2024]
Abstract
An air-stable, robust, and well-defined copper(II)-7-azaindole-N-oxide-based catalyst [Cu2II(7-AINO)4] (abbreviated as Cu(II)-7-AINO) has been demonstrated as an efficient catalyst for various Ullmann-type coupling reactions. This easily prepared and cost-effective catalyst facilitates the arylation and heteroarylation of diverse N-, S-, and O-nucleophiles, including azoles, aminoazoles, (hetero)arylthiols, and phenols. Notably, they also exhibit substantial compatibility with a wide range of functional groups. Furthermore, the catalyst demonstrates significant selectivity for -NH sites of aminoazoles and -SH sites of aminothiophenols over -NH2 sites in both cases, enhancing its versatility. Exploiting the catalyst's chemo- and regioselective properties, we have successfully demonstrated the applicability of our methodology in synthesizing various drug molecules. Specifically, Epirizole analogue, Nilotinib, and Vortioxetine were successfully synthesized using our protocol.
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Affiliation(s)
- Vishal Talukdar
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India
| | - Krishanu Mondal
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India
| | - Pallabi Halder
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India
| | - Parthasarathi Das
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India
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11
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Aghajani M, Dabiri M. Ultrasound-assisted Cu(II) Strecker-functionalized organocatalyst for green azide-alkyne cycloaddition and Ullmann reactions. Sci Rep 2024; 14:12141. [PMID: 38802456 PMCID: PMC11130308 DOI: 10.1038/s41598-024-62826-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Accepted: 05/21/2024] [Indexed: 05/29/2024] Open
Abstract
A new aminonitrile-functionalized Fe3O4 has been synthesized via the Strecker reaction, the designed aminonitrile ligand on the surface of the magnetic core coordinated to copper(II) to obtain the final new catalyst. The fabricated nanocatalyst was characterized by Fourier transform Infrared (FT-IR), Field Emission Scanning Electron Microscopy (FESEM), Energy-Dispersive X-ray spectroscopy (EDX), Transmission Electron Microscopy (TEM), Vibrating-Sample Magnetometer (VSM), Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES), and Thermogravimetric Analysis (TGA). The high tendency of nitrogens in the aminonitrile functional group to make a complex with Cu(II) has caused the practical activity of this nucleus in this catalyst. This nanocatalyst performance was investigated in azide-alkyne Huisgen cycloaddition (3 + 2) reaction for achieving to 1,4-disubstituted 1,2,3-triazoles in water as a green media at room temperature. In another try, Classic Ullmann Reaction was investigated for the synthesis of biaryls at 85 °C promoted by ultrasonic condition (37 kHz). The reaction scope was explored using different reactants and the results of using this developed catalytic system demonstrated its capacity to reduce the reaction time and enhance the reaction efficiency to provide good to excellent product yield. Conversely, the simple recycling and reusability of this catalyst for at least six times without any noticeable leaching of copper makes it a potential future catalyst for synthesizing such compounds.
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Affiliation(s)
- Mahyar Aghajani
- Department of Organic Chemistry and Oil, Faculty of Chemistry and Petroleum Sciences, Shahid Beheshti University, Tehran, 1983969411, Islamic Republic of Iran.
| | - Minoo Dabiri
- Department of Organic Chemistry and Oil, Faculty of Chemistry and Petroleum Sciences, Shahid Beheshti University, Tehran, 1983969411, Islamic Republic of Iran
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12
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Morrison KM, Stradiotto M. The development of cage phosphine 'DalPhos' ligands to enable nickel-catalyzed cross-couplings of (hetero)aryl electrophiles. Chem Sci 2024; 15:7394-7407. [PMID: 38784740 PMCID: PMC11110136 DOI: 10.1039/d4sc01253d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Accepted: 04/23/2024] [Indexed: 05/25/2024] Open
Abstract
Nickel-catalyzed cross-couplings of (hetero)aryl electrophiles with a diversity of nucleophiles (nitrogen, oxygen, carbon, and others) have evolved into competitive alternatives to well-established palladium- and copper-based protocols for the synthesis of (hetero)aryl products, including (hetero)anilines and (hetero)aryl ethers. A survey of the literature reveals that the use of cage phosphine (CgP) 'DalPhos' (DALhousie PHOSphine) bisphosphine-type ligands operating under thermal conditions currently offers the most broad substrate scope in nickel-catalyzed cross-couplings of this type, especially involving (hetero)aryl chlorides and phenol-derived electrophiles. The development and application of these DalPhos ligands is described in a ligand-specific manner that is intended to serve as a guide for the synthetic chemistry end-user.
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Affiliation(s)
- Kathleen M Morrison
- Department of Chemistry, Dalhousie University 6274 Coburg Road, P.O. 15000 Halifax Nova Scotia B3H 4R2 Canada
| | - Mark Stradiotto
- Department of Chemistry, Dalhousie University 6274 Coburg Road, P.O. 15000 Halifax Nova Scotia B3H 4R2 Canada
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13
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Kumar Chaudhary V, Kukreti P, Sharma K, Kumar K, Singh S, Kumari S, Ghosh K. A sustainable strategic approach for N-alkylation of amines with activation of alcohols triggered via a hydrogen auto-transfer reaction using a Pd(II) complex: evidence for metal-ligand cooperativity. Dalton Trans 2024; 53:8740-8749. [PMID: 38712566 DOI: 10.1039/d4dt00864b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
This work describes a new well-defined, air-stable, phosphine free palladium(II) [Pd(L)Cl] (1) catalyst. This catalyst was utilized for N-alkylation of amines and indole synthesis where H2O was found to be the by-product. A broad range of aromatic amines were alkylated using this homogeneous catalyst with a catalyst loading of 0.1 mol%. Greener aromatic and aliphatic primary alcohols were utilized and a hydrogen auto-transfer strategy via a metal-ligand cooperative approach was investigated. The precursor of the antihistamine-containing drug molecule tripelennamine was synthesized on a gram scale for large-scale applicability of the current synthetic methodology. A number of control experiments were performed to investigate the possible reaction pathway and the outcomes of these experiments indicated the azo-chromophore as a hydrogen reservoir during the catalytic cycle.
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Affiliation(s)
- Virendra Kumar Chaudhary
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Prashant Kukreti
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Keshav Sharma
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Kapil Kumar
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Sain Singh
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Sheela Kumari
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
| | - Kaushik Ghosh
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
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14
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Ghosh A, Sagadevan A, Murugesan K, Nastase SAF, Maity B, Bodiuzzaman M, Shkurenko A, Hedhili MN, Yin J, Mohammed OF, Eddaoudi M, Cavallo L, Rueping M, Bakr OM. Multiple neighboring active sites of an atomically precise copper nanocluster catalyst for efficient bond-forming reactions. MATERIALS HORIZONS 2024; 11:2494-2505. [PMID: 38477151 DOI: 10.1039/d4mh00098f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
Atomically precise copper nanoclusters (NCs) are an emerging class of nanomaterials for catalysis. Their versatile core-shell architecture opens the possibility of tailoring their catalytically active sites. Here, we introduce a core-shell copper nanocluster (CuNC), [Cu29(StBu)13Cl5(PPh3)4H10]tBuSO3 (StBu: tert-butylthiol; PPh3: triphenylphosphine), Cu29NC, with multiple accessible active sites on its shell. We show that this nanocluster is a versatile catalyst for C-heteroatom bond formation (C-O, C-N, and C-S) with several advantages over previous Cu systems. When supported, the cluster can also be reused as a heterogeneous catalyst without losing its efficiency, making it a hybrid homogeneous and heterogeneous catalyst. We elucidated the atomic-level mechanism of the catalysis using density functional theory (DFT) calculations based on the single crystal structure. We found that the cooperative action of multiple neighboring active sites is essential for the catalyst's efficiency. The calculations also revealed that oxidative addition is the rate-limiting step that is facilitated by the neighboring active sites of the Cu29NC, which highlights a unique advantage of nanoclusters over traditional copper catalysts. Our results demonstrate the potential of nanoclusters for enabling the rational atomically precise design and investigation of multi-site catalysts.
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Affiliation(s)
- Atanu Ghosh
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Arunachalam Sagadevan
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Kathiravan Murugesan
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Stefan Adrian F Nastase
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Bholanath Maity
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Mohammad Bodiuzzaman
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Aleksander Shkurenko
- Advanced Membranes and Porous Materials Center (AMPMC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Mohamed Nejib Hedhili
- Core Labs, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Jun Yin
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, 999077, Hong Kong, China
| | - Omar F Mohammed
- Advanced Membranes and Porous Materials Center (AMPMC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Mohamed Eddaoudi
- Advanced Membranes and Porous Materials Center (AMPMC), Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Luigi Cavallo
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Magnus Rueping
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
| | - Osman M Bakr
- KAUST Catalysis Center (KCC), Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
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15
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Cook A, Newman SG. Alcohols as Substrates in Transition-Metal-Catalyzed Arylation, Alkylation, and Related Reactions. Chem Rev 2024; 124:6078-6144. [PMID: 38630862 DOI: 10.1021/acs.chemrev.4c00094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Alcohols are abundant and attractive feedstock molecules for organic synthesis. Many methods for their functionalization require them to first be converted into a more activated derivative, while recent years have seen a vast increase in the number of complexity-building transformations that directly harness unprotected alcohols. This Review discusses how transition metal catalysis can be used toward this goal. These transformations are broadly classified into three categories. Deoxygenative functionalizations, representing derivatization of the C-O bond, enable the alcohol to act as a leaving group toward the formation of new C-C bonds. Etherifications, characterized by derivatization of the O-H bond, represent classical reactivity that has been modernized to include mild reaction conditions, diverse reaction partners, and high selectivities. Lastly, chain functionalization reactions are described, wherein the alcohol group acts as a mediator in formal C-H functionalization reactions of the alkyl backbone. Each of these three classes of transformation will be discussed in context of intermolecular arylation, alkylation, and related reactions, illustrating how catalysis can enable alcohols to be directly harnessed for organic synthesis.
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Affiliation(s)
- Adam Cook
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Stephen G Newman
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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16
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Niu C, Zhang Z, Li Q, Cheng Z, Jiao N, Zhang C. Selective Ring-Opening Amination of Isochromans and Tetrahydroisoquinolines. Angew Chem Int Ed Engl 2024; 63:e202401318. [PMID: 38459760 DOI: 10.1002/anie.202401318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/29/2024] [Accepted: 03/04/2024] [Indexed: 03/10/2024]
Abstract
The molecular structure-editing through selective C-C bond cleavage allows for the precise modification of molecular structures and opens up new possibilities in chemical synthesis. By strategically cleaving C-C bonds and editing the molecular structure, more efficient and versatile pathways for the synthesis of complex compounds could be designed, which brings significant implications for drug development and materials science. o-Aminophenethyl alcohols and amines are the essential key motifs in bioactive and functional material molecules. The traditional synthesis of these compounds usually requires multiple steps which could generate inseparable isomers and induce low efficiencies. By leveraging a molecular editing strategy, we herein reported a selective ring-opening amination of isochromans and tetrahydroisoquinolines for the efficient synthesis of o-aminophenethyl alcohols and amines. This innovative chemistry allows for the precise cleavage of C-C bonds under mild transition metal-free conditions. Notably, further synthetic application demonstrated that our method could provide an efficient approach to essential components of diverse bioactive molecules.
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Affiliation(s)
- Changhao Niu
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, 300072, Tianjin, China
| | - Zheng Zhang
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, 300072, Tianjin, China
| | - Qi Li
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, 300072, Tianjin, China
| | - Zengrui Cheng
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, 100191, Beijing, China
| | - Ning Jiao
- State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, 100191, Beijing, China
| | - Chun Zhang
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, 300072, Tianjin, China
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17
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Chen J, Li M, Yang Y, Liu H, Zhao B, Ozaki Y, Song W. In-situ surface enhanced Raman spectroscopy revealing the role of metal-organic frameworks on photocatalytic reaction selectivity on highly sensitive and durable Cu-CuBr substrate. J Colloid Interface Sci 2024; 660:669-680. [PMID: 38271803 DOI: 10.1016/j.jcis.2024.01.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 01/02/2024] [Accepted: 01/09/2024] [Indexed: 01/27/2024]
Abstract
Photocatalytic reactions using copper-based nanomaterials have emerged as a new paradigm in green technology. Selective photocatalysis is very important for improving energy utilization efficiency, and in order to directional improve catalytic selectivity, it is necessary to understand the mechanism of interfacial reactions at the molecular level. Therefore, a unique bifunctional Cu-CuBr substrate is first fabricated via an electrochemical method, which overcomes the instability of traditional copper-based materials and endows high surface-enhanced Raman spectroscopy (SERS) sensitivity and photocatalytic performance and can be stored stably for more than a year. Further modification of the surface with Metal-Organic Frameworks (MOFs) containing carboxyl functional groups can significantly tune the surface properties of the substrate. This increases the adsorption of cationic dyes to improve the SERS effect, and 10-10 M methylene blue can easily be detected with this substrate. Surprisingly, in-situ SERS monitoring of the interfacial photocatalytic dehalogenation reaction of aromatic halides through its intrinsic SERS effect reveal two competing selective reaction pathways, self-coupling and hydrogenation. Typically, the SERS spectra reveal that the latter's selectivity was greatly enhanced after MOFs modification, and the yield rate of the hydrogenated product increased from 27.6 % to 46.9 % (selectivity increased from 32.7 % to 51.5 %). This proves that the surface properties of catalysts, especially the affinity for reaction intermediates, can effectively regulate catalytic selectivity.
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Affiliation(s)
- Junjie Chen
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Mengyuan Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Yumei Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Hao Liu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Bing Zhao
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China
| | - Yukihiro Ozaki
- School of Biological and Environmatal Sciences, Kwansei Gakuin University, 1-Gakuen-Uegahara, Sanda, Hyogo 669-1330, Japan
| | - Wei Song
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, PR China.
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18
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Durán R, Barrales-Martínez C, Santana-Romo F, Rodríguez DF, Zacconi FC, Herrera B. Substitution Effects in Aryl Halides and Amides into the Reaction Mechanism of Ullmann-Type Coupling Reactions. Molecules 2024; 29:1770. [PMID: 38675590 PMCID: PMC11051942 DOI: 10.3390/molecules29081770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/03/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
In this article, we present a comprehensive computational investigation into the reaction mechanism of N-arylation of substituted aryl halides through Ullmann-type coupling reactions. Our computational findings, obtained through DFT ωB97X-D/6-311G(d,p) and ωB97X-D/LanL2DZ calculations, reveal a direct relation between the previously reported experimental reaction yields and the activation energy of haloarene activation, which constitutes the rate-limiting step in the overall coupling process. A detailed analysis of the reaction mechanism employing the Activation Strain Model indicates that the strain in the substituted iodoanilines is the primary contributor to the energy barrier, representing an average of 80% of the total strain energy. Additional analysis based on conceptual Density Functional Theory (DFT) suggests that the nucleophilicity of the nitrogen in the lactam is directly linked to the activation energies. These results provide valuable insights into the factors influencing energetic barriers and, consequently, reaction yields. These insights enable the rational modification of reactants to optimize the N-arylation process.
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Affiliation(s)
- Rocío Durán
- Instituto de Investigación Interdisciplinaria (I3), Vicerrectoría Académica, Centro de Bioinformática, Simulación y Modelado (CBSM), Facultad de Ingeniería, Universidad de Talca, Campus Lircay, Talca 3460000, Chile; (R.D.); (C.B.-M.)
| | - César Barrales-Martínez
- Instituto de Investigación Interdisciplinaria (I3), Vicerrectoría Académica, Centro de Bioinformática, Simulación y Modelado (CBSM), Facultad de Ingeniería, Universidad de Talca, Campus Lircay, Talca 3460000, Chile; (R.D.); (C.B.-M.)
| | - Fabián Santana-Romo
- Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile; (F.S.-R.); (D.F.R.)
- Departamento de Ciencias Exactas, Universidad de las Fuerzas Armadas ESPE, Sangolquí 171103, Ecuador
| | - Diego F. Rodríguez
- Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile; (F.S.-R.); (D.F.R.)
| | - Flavia C. Zacconi
- Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile; (F.S.-R.); (D.F.R.)
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - Barbara Herrera
- Laboratorio de Química Teórica Computacional (QTC), Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile
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19
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Yi ZY, Wang ZC, Li RN, Li ZH, Duan JJ, Yang XQ, Wang YQ, Chen T, Wang D, Wan LJ. Silver Surface-Assisted Dehydrobrominative Cross-Coupling between Identical Aryl Bromides. J Am Chem Soc 2024. [PMID: 38598684 DOI: 10.1021/jacs.4c00825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
Cross-coupling reactions represent an indispensable tool in chemical synthesis. An intriguing challenge in this field is to achieve selective cross-coupling between two precursors with similar reactivity or, to the limit, the identical molecules. Here we report an unexpected dehydrobrominative cross-coupling between 1,3,5-tris(2-bromophenyl)benzene molecules on silver surfaces. Using scanning tunneling microscopy, we examine the reaction process at the single-molecular level, quantify the selectivity of the dehydrobrominative cross-coupling, and reveal the modulation of selectivity by substrate lattice-related catalytic activity or molecular assembly effect. Theoretical calculations indicate that the dehydrobrominative cross-coupling proceeds via regioselective C-H bond activation of debrominated TBPB and subsequent highly selective C-C coupling of the radical-based intermediates. The reaction kinetics plays an important role in the selectivity for the cross-coupling. This work not only expands the toolbox for chemical synthesis but also provides important mechanistic insights into the selectivity of coupling reactions on the surface.
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Affiliation(s)
- Zhen-Yu Yi
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zi-Cong Wang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ruo-Ning Li
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi-Hao Li
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun-Jie Duan
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xue-Qing Yang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yu-Qi Wang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ting Chen
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Dong Wang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li-Jun Wan
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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20
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Dennis FM, Romero Arenas A, Rodgers G, Shanmugam M, Andrews JA, Peralta-Arriaga SL, Partridge BM. Cu-Catalyzed Coupling of Aliphatic Amines with Alkylboronic Esters. Chemistry 2024; 30:e202303636. [PMID: 38168746 DOI: 10.1002/chem.202303636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/28/2023] [Accepted: 01/02/2024] [Indexed: 01/05/2024]
Abstract
We report a Cu-catalyzed oxidative coupling of aliphatic amines with benzylic and aliphatic boronic esters to give high value alkyl amines, products found widely in applications from medicinal chemistry to materials science. This operationally simple reaction, which can be performed on gram scale, runs under mild conditions and exhibits broad functional group tolerance. The terminal oxidant of the reaction is O2 from the air, avoiding the need for additional chemical oxidants. Investigation into the reaction mechanism suggests that the boronic ester is activated by an aminyl radical, formed through oxidation of the amine by the Cu catalyst, to give a key alkyl radical intermediate. To demonstrate its utility and potential for late-stage functionalization, we showcase the method as the final step in the total synthesis of a TRPV1 antagonist.
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Affiliation(s)
- Francesca M Dennis
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield, S3 7HF, United Kingdom
| | - Antonio Romero Arenas
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield, S3 7HF, United Kingdom
| | - George Rodgers
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield, S3 7HF, United Kingdom
| | - Muralidharan Shanmugam
- Department of Chemistry and Photon Science Institute, The University of Manchester, Manchester, M13 9PL, United Kingdom
| | - Jonathan A Andrews
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield, S3 7HF, United Kingdom
| | | | - Benjamin M Partridge
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield, S3 7HF, United Kingdom
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21
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Liu S, Liu X, Zhang TS, Bao X, Sheng X, Qi Z, Jiang D. Electro-oxidative intermolecular C SP2-H amination of heteroarenes via proton-coupled electron transfer. Org Biomol Chem 2024; 22:2549-2553. [PMID: 38446035 DOI: 10.1039/d4ob00164h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2024]
Abstract
A new electrochemical proton-coupled electron transfer method for the intermolecular CSP2-H amination of heteroarenes without oxidants, metal catalysts and external electrolytes has been developed. Various new N-containing heteroarenes were prepared in medium to high yields, and the indole-containing product could be converted into practical 2-oxindole by simple basic hydrolysis. Mechanistic investigation indicated that ester sulfonyl-substituted N-radicals could be formed by the combination of 2,6-lutidine and electrochemical oxidation, which is the key to achieve the desired chemoselectivity.
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Affiliation(s)
- Shuai Liu
- School of Materials and Chemical Engineering, Xuzhou University of Technology, Xuzhou, Jiangsu, 221018, P. R. China.
| | - Xin Liu
- School of Materials and Chemical Engineering, Xuzhou University of Technology, Xuzhou, Jiangsu, 221018, P. R. China.
| | - Tian-Shu Zhang
- School of Materials and Chemical Engineering, Xuzhou University of Technology, Xuzhou, Jiangsu, 221018, P. R. China.
| | - Xiaoyu Bao
- School of Materials and Chemical Engineering, Xuzhou University of Technology, Xuzhou, Jiangsu, 221018, P. R. China.
| | - Xiaoyu Sheng
- School of Materials and Chemical Engineering, Xuzhou University of Technology, Xuzhou, Jiangsu, 221018, P. R. China.
| | - Zhenjie Qi
- Department of Engineering, Jining University, Qufu, Shandong, 273155, P. R. China.
| | - Dongfang Jiang
- College of Life Science and Chemistry, Hunan University of Technology, Zhuzhou, Hunan, 412008, P. R. China.
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22
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Kiyokawa K, Kawanaka K, Minakata S. Amino-λ 3 -iodane-Enabled Electrophilic Amination of Arylboronic Acid Derivatives. Angew Chem Int Ed Engl 2024; 63:e202319048. [PMID: 38272833 DOI: 10.1002/anie.202319048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/17/2024] [Accepted: 01/25/2024] [Indexed: 01/27/2024]
Abstract
In this report, we describe the use of amino-λ3 -iodanes in the electrophilic amination of arylboronic acids and boronates. Iodine(III) reagents with transferable amino groups, including one with an NH2 group, were synthesized and used in the amination, allowing the synthesis of a wide range of primary and secondary (hetero)arylamines. Mechanistic studies by DFT calculations indicate that the reaction proceeds through an electrophilic amination process from a tetravalent borate complex with a B-N dative bond.
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Affiliation(s)
- Kensuke Kiyokawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Kazuki Kawanaka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
| | - Satoshi Minakata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka 565-0871, Japan
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23
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Tang J, Xie L, Liu J, Shi S, Yang Q, Zhang B, Wang Y, Chen L, Jia S, Ma M, Xie Z. Direct Access to Thio- and Seleno-acetamides Bearing (Benzo)thiazoles by a Base-Promoted One-Pot Two-Step Three-Component Reaction of 2-Amino(benzo)thiazoles with Aryl Acetyl Chlorides and Dichalcogenides. J Org Chem 2024; 89:3702-3712. [PMID: 38430193 DOI: 10.1021/acs.joc.3c02145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2024]
Abstract
Highly efficient and practical carbon-chalcogen (S, Se) and amide bonds formation methodologies for the synthesis of thio- and seleno-acetamides were developed, via the base-promoted one-pot two-step reactions of 2-amino(benzo)thiazoles and aryl acetyl chlorides with dichalcogenides. This cross-coupling reaction afforded the goal products that had been chalcogenated regioselectively in moderate to good yields. Further transformations of the new synthesized compounds, DFT calculations and preliminary mechanism studies are discussed as well.
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Affiliation(s)
- Jingjie Tang
- Laboratory of New Antitumor Drug Molecular Design & Synthesis, College of Basic Medicine, Jining Medical University, Jining 272067, China
| | - Luying Xie
- Laboratory of New Antitumor Drug Molecular Design & Synthesis, College of Basic Medicine, Jining Medical University, Jining 272067, China
| | - Jiayu Liu
- Laboratory of New Antitumor Drug Molecular Design & Synthesis, College of Basic Medicine, Jining Medical University, Jining 272067, China
| | - Shangyu Shi
- Laboratory of New Antitumor Drug Molecular Design & Synthesis, College of Basic Medicine, Jining Medical University, Jining 272067, China
| | - Qikun Yang
- Laboratory of New Antitumor Drug Molecular Design & Synthesis, College of Basic Medicine, Jining Medical University, Jining 272067, China
| | - Bo Zhang
- Laboratory of New Antitumor Drug Molecular Design & Synthesis, College of Basic Medicine, Jining Medical University, Jining 272067, China
| | - Yingying Wang
- Laboratory of New Antitumor Drug Molecular Design & Synthesis, College of Basic Medicine, Jining Medical University, Jining 272067, China
| | - Lin Chen
- Laboratory of New Antitumor Drug Molecular Design & Synthesis, College of Basic Medicine, Jining Medical University, Jining 272067, China
| | - Shaohui Jia
- Laboratory of New Antitumor Drug Molecular Design & Synthesis, College of Basic Medicine, Jining Medical University, Jining 272067, China
| | - Mingfang Ma
- Laboratory of New Antitumor Drug Molecular Design & Synthesis, College of Basic Medicine, Jining Medical University, Jining 272067, China
| | - Zengyang Xie
- Laboratory of New Antitumor Drug Molecular Design & Synthesis, College of Basic Medicine, Jining Medical University, Jining 272067, China
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24
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Lei Z, Yao J, Xiao Y, Liu WH, Yu L, Duan W, Li CJ. Dual role of nitroarenes as electrophiles and arylamine surrogates in Buchwald-Hartwig-type coupling for C-N bond construction. Chem Sci 2024; 15:3552-3561. [PMID: 38455022 PMCID: PMC10915857 DOI: 10.1039/d3sc06618e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 01/24/2024] [Indexed: 03/09/2024] Open
Abstract
One of the most widely utilized methods for the construction of C(sp2)-N bonds is the transition-metal-catalyzed cross-coupling of aryl halides/boronic acids with amines, known as Ullmann condensation, Buchwald-Hartwig amination, and Chan-Lam coupling. However, aryl halides/boronic acids often require multi-step preparation while generating a large amount of corrosive and toxic waste, making the reaction less attractive. Herein, we present an unprecedented method for the C(sp2)-N formation via Buchwald-Hartwig-type reactions using synthetically upstream nitroarenes as the sole starting materials, thus eliminating the need for arylhalides and pre-formed arylamines. A diverse range of symmetrical di- and triarylamines were obtained in a single step from nitroarenes, and more importantly, various unsymmetrical di- and triarylamines were also highly selectively synthesized in a one-pot/two-step process. Furthermore, the success of the scale-up experiments, the late-stage functionalization of a drug intermediate, and the rapid preparation of hole-transporting material TCTA showcased the utility and practicality of this protocol in synthetic chemistry. Mechanistic studies indicate that this transformation may proceed via an arylamine intermediate generated in situ from the reduction of nitroarenes, which is followed by a denitrative Buchwald-Hartwig-type reaction with another nitroarene to form a C-N bond.
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Affiliation(s)
- Zhiguo Lei
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, Guangxi University East Daxue Road Nanning Guangxi 530004 P. R. China
| | - Jiaxin Yao
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, Guangxi University East Daxue Road Nanning Guangxi 530004 P. R. China
| | - Yuxuan Xiao
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, Guangxi University East Daxue Road Nanning Guangxi 530004 P. R. China
| | - Wenbo H Liu
- School of Chemistry, Sun Yat-sen University Guangzhou 510006 China
| | - Lin Yu
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, Guangxi University East Daxue Road Nanning Guangxi 530004 P. R. China
| | - Wengui Duan
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Electrochemical Energy Materials, Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, Guangxi University East Daxue Road Nanning Guangxi 530004 P. R. China
| | - Chao-Jun Li
- Department of Chemistry and FRQNT Center for Green Chemistry and Catalysis, McGill University 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
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25
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Karpova L, Daniel M, Kancherla R, Muralirajan K, Maity B, Rueping M. Excited-State Nickel-Catalyzed Amination of Aryl Bromides: Synthesis of Diphenylamines and Primary Anilines. Org Lett 2024; 26:1657-1661. [PMID: 38381879 DOI: 10.1021/acs.orglett.4c00147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Excited-state nickel-catalyzed C-N cross-coupling of aryl bromides with sodium azide enables the synthesis of diarylamines and primary anilines under mild reaction conditions. The oxidative addition of electron-rich aryl bromides with low-valent Ni under the photochemical conditions is endothermic. Herein, we demonstrate a light-mediated nickel-catalyzed reaction of electronically rich aryl bromides that yields diarylamines, while the reaction with electron-deficient aryl bromides gives access to anilines at room temperature.
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Affiliation(s)
- Lidia Karpova
- Kaust Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Matěj Daniel
- Kaust Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Rajesh Kancherla
- Kaust Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Krishnamoorthy Muralirajan
- Kaust Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Bholanath Maity
- Kaust Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Magnus Rueping
- Kaust Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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26
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Li J, Long S. 4-Fluoro-2-(phenyl-amino)-benzoic acid. IUCRDATA 2024; 9:x240197. [PMID: 38586516 PMCID: PMC10993557 DOI: 10.1107/s2414314624001974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 02/29/2024] [Indexed: 04/09/2024] Open
Abstract
The title compound, C13H10FNO2, was obtained by the reaction of 2-bromo-4-fluoro-benzoic acid with aniline. There are two independent mol-ecules, A and B, in the asymmetric unit, with slight conformational differences: the dihedral angles between the aromatic rings are 55.63 (5) and 52.65 (5)°. Both mol-ecules feature an intra-molecular N-H⋯O hydrogen bond. In the crystal, the mol-ecules are linked by pairwise O-H⋯O hydrogen bonds to form A-B acid-acid dimers and weak C-H⋯F inter-actions further connect the dimers.
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Affiliation(s)
- Jingxi Li
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan, Hubei 430205, People’s Republic of China
| | - Sihui Long
- School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan, Hubei 430205, People’s Republic of China
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27
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He Y, Li Y, Ma X, Zhou X, Huang Y, Sun J. Aryliodonium Salt-Induced Regioselective Access to meta-Substituted Anilines by Arylation of Azoles. J Org Chem 2024. [PMID: 38385662 DOI: 10.1021/acs.joc.3c02417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
A highly efficient aryliodonium salt-induced regioselective access to meta-substituted anilines by arylation of azoles has been developed under catalyst-free conditions. This efficient transformation provides a facile and scalable approach to a wide range of biologically active N-arylazoles with moderate to high yields. According to the control experiments, two plausible pathways, including a Michael pathway and a free radical coupling pathway, for the reaction were proposed.
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Affiliation(s)
- Yaqi He
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Yanan Li
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Xiangmei Ma
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Xuan Zhou
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Yekai Huang
- School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China
| | - Jianan Sun
- School of Biomedical Engineering, Anhui Medical University, Hefei 230032, China
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28
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Zou S, Zhang Y, Wu Q, Zhao T, Li Y, Liu B, Ma X. Metal-Free, Hindered, Regioselective Access to Multifunctional Groups Diarylamines via S N Ar Substitution of P-Nitroso Aromatic Methyl Ether by Arylamines. Chemistry 2024; 30:e202303421. [PMID: 38010239 DOI: 10.1002/chem.202303421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/23/2023] [Accepted: 11/24/2023] [Indexed: 11/29/2023]
Abstract
Multifunctional groups diarylamines, an innovative product, efficiently produced from arylamines and p-nitrosoanisole derivatives by intermolecular SN Ar under weak acid conditions. This SN Ar proceeds under mild reaction conditions, and more significantly, the substrates involved do not necessarily require strong electron-withdrawing groups. Moreover, this SN Ar is characterized by resistance to space crowding, tolerance to halogen and nitroso functional groups, and high regioselectivity. Mechanistic observations suggest that the SN Ar is the result of the transfer of the positive charge center of the protonated nitroso group to the p-methoxy group.
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Affiliation(s)
- Shuliang Zou
- School of Food and Drug Manufacturing Engineering, Guizhou Institute of Technology, Doctor Road, Dangwu Town, Gui'an New District, Guiyang, 550003, PR China
| | - Yazhou Zhang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, No. 4, Dongqing Road, Huaxi District, Guiyang, 550025, PR China
| | - Qin Wu
- School of Food and Drug Manufacturing Engineering, Guizhou Institute of Technology, Doctor Road, Dangwu Town, Gui'an New District, Guiyang, 550003, PR China
| | - Tianming Zhao
- School of Food and Drug Manufacturing Engineering, Guizhou Institute of Technology, Doctor Road, Dangwu Town, Gui'an New District, Guiyang, 550003, PR China
| | - Yutao Li
- School of Food and Drug Manufacturing Engineering, Guizhou Institute of Technology, Doctor Road, Dangwu Town, Gui'an New District, Guiyang, 550003, PR China
| | - Bing Liu
- School of Food and Drug Manufacturing Engineering, Guizhou Institute of Technology, Doctor Road, Dangwu Town, Gui'an New District, Guiyang, 550003, PR China
| | - Xianguo Ma
- School of Chemical Engineering, Guizhou Institute of Technology, Doctor Road, Dangwu Town, Gui'an New District, Guiyang, 550003, PR China
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29
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Castillo-Garcia AA, Kappe CO, Cantillo D, Barta K. Aniline Derivatives from Lignin under Mild Conditions Enabled by Electrochemistry. CHEMSUSCHEM 2024; 17:e202301374. [PMID: 37988183 DOI: 10.1002/cssc.202301374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 11/23/2023]
Abstract
The development of environmentally friendly methods for the valorization of important phenolic platform chemicals originating directly from lignin-first depolymerization into value-added N-chemicals, such as aniline derivatives, is of high industrial interest. In this work, we tackle this challenging transformation by the judicious combination of electrochemical conversion and chemical functionalization steps. In the first step, lignin-derived para-substituted guaiacols and syringols undergo an atom-efficient, room-temperature anodic oxidation using methanol both as solvent and reagent towards the formation of the corresponding cyclohexadienone derivatives, which are subsequently converted to synthetically challenging ortho-methoxy substituted anilines by reaction with ethyl glycinate hydrochloride under mild conditions. The developed method was applied to crude lignin depolymerization bio-oils, derived from reductive catalytic fractionation (RCF) mediated either by copper-doped porous metal oxide (Cu20 PMO) or Ru/C, allowing the selective production of 4-propanol-2-methoxyaniline (1Gb) and 4-propyl-2-methoxyaniline (2Gb), respectively, from pine lignocellulose. Finally, the application of 2Gb was further studied in the synthesis of carbazole 2Gc, a lignin-derived analogue of biologically active alkaloid murrayafoline A.
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Affiliation(s)
- Antonio A Castillo-Garcia
- Institute of Chemistry, University of Graz, Heinchstrasse 28, A-8010, Graz, Austria
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, Groningen, The Netherlands
| | - Christian Oliver Kappe
- Institute of Chemistry, University of Graz, Heinchstrasse 28, A-8010, Graz, Austria
- Center for Continuous Flow Synthesis and Processing (CCFLOW), Research Center Pharmaceutical Engineering GmbH (RCPE), Inffeldgasse 13, A-8010, Graz, Austria
| | - David Cantillo
- Institute of Chemistry, University of Graz, Heinchstrasse 28, A-8010, Graz, Austria
- Center for Continuous Flow Synthesis and Processing (CCFLOW), Research Center Pharmaceutical Engineering GmbH (RCPE), Inffeldgasse 13, A-8010, Graz, Austria
| | - Katalin Barta
- Institute of Chemistry, University of Graz, Heinchstrasse 28, A-8010, Graz, Austria
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30
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Song G, Song J, Li Q, Nong DZ, Dong J, Li G, Fan J, Wang C, Xiao J, Xue D. Werner Salt as Nickel and Ammonia Source for Photochemical Synthesis of Primary Aryl Amines. Angew Chem Int Ed Engl 2024; 63:e202314355. [PMID: 37914669 DOI: 10.1002/anie.202314355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 10/30/2023] [Accepted: 10/31/2023] [Indexed: 11/03/2023]
Abstract
Cheap, stable and easy-to-handle Werner ammine salts have been known for more than a century; but they have been rarely used in organic synthesis. Herein, we report that the Werner hexammine complex [Ni(NH3 )6 ]Cl2 can be used as both a nitrogen and a catalytic nickel source that allow for the efficient amination of aryl chlorides in the presence of a catalytic amount of bipyridine ligand under the irradiation of 390-395 nm light without the need of any additional catalysts. More than 80 aryl chlorides, including more than 20 drug molecules, were aminated, demonstrating the practicality and generality of this method in synthetic chemistry. A slow NH3 release mechanism is in operation, obviating the problem of catalyst poisoning. Still interestingly, we show that the Werner salt can be easily recovered and reused, solving the problem of difficult recovery of transition metal nickel catalysts. The protocol thus provides an efficient new strategy for the synthesis of primary aryl amines.
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Affiliation(s)
- Geyang Song
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shaanxi Normal University, 710062, Xi'an, China
| | - Jiameng Song
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shaanxi Normal University, 710062, Xi'an, China
| | - Qi Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shaanxi Normal University, 710062, Xi'an, China
| | - Ding-Zhan Nong
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shaanxi Normal University, 710062, Xi'an, China
| | - Jianyang Dong
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shaanxi Normal University, 710062, Xi'an, China
| | - Gang Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shaanxi Normal University, 710062, Xi'an, China
| | - Juan Fan
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shaanxi Normal University, 710062, Xi'an, China
| | - Chao Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shaanxi Normal University, 710062, Xi'an, China
| | - Jianliang Xiao
- Department of Chemistry, University of Liverpool, L69 7ZD, Liverpool, UK
| | - Dong Xue
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education and School of Chemistry and Chemical Engineering, Shaanxi Normal University, 710062, Xi'an, China
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31
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Sarkar S, Pal S, Mukherjee A, Santra S, Zyryanov GV, Majee A. Visible-Light-Promoted Metal- and Photocatalyst-Free Reactions between Arylglyoxylic Acids and Tetraalkylthiuram Disulfides: Synthesis of α-Ketoamides. J Org Chem 2024; 89:1473-1482. [PMID: 38225732 DOI: 10.1021/acs.joc.3c02081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
A convenient and new synthetic approach has been developed for the oxidative cross-coupling of the C-N bond through the reaction between arylglyoxylic acids and tetraalkylthiuram disulfides. The reaction proceeds under ambient air at room temperature in the presence of visible light. This reaction offers a metal-, base-, photocatalyst-, and solvent-free synthesis of various α-ketoamides with moderate to excellent yields via the radical pathway. In addition, this protocol demonstrates the potential application of a gram-scale synthesis.
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Affiliation(s)
- Subhankar Sarkar
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Satyajit Pal
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Anindita Mukherjee
- Department of Organic and Biomolecular Chemistry, Chemical Engineering Institute, Ural Federal University, 19 Mira Street, 620002 Yekaterinburg, Russian Federation
| | - Sougata Santra
- Department of Organic and Biomolecular Chemistry, Chemical Engineering Institute, Ural Federal University, 19 Mira Street, 620002 Yekaterinburg, Russian Federation
| | - Grigory V Zyryanov
- Department of Organic and Biomolecular Chemistry, Chemical Engineering Institute, Ural Federal University, 19 Mira Street, 620002 Yekaterinburg, Russian Federation
- I. Ya. Postovskiy Institute of Organic Synthesis, Ural Division of the Russian Academy of Sciences, 22 S. Kovalevskoy Street, 620219 Yekaterinburg, Russian Federation
| | - Adinath Majee
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
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32
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Yamanoi Y. Recent Progress on the Synthesis of Bipyridine Derivatives. Molecules 2024; 29:576. [PMID: 38338319 PMCID: PMC10856230 DOI: 10.3390/molecules29030576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 01/19/2024] [Accepted: 01/19/2024] [Indexed: 02/12/2024] Open
Abstract
Bipyridine and related compounds are starting materials or precursors for a variety of valuable substances such as biologically active molecules, ligands for catalysts, photosensitizers, viologens, and supramolecular architectures. Thus, it is important to classify their synthesis methods and understand their characteristics. Representative examples include methods using homo and heterocoupling of pyridine derivatives in the presence of a catalyst. Because bipyridine compounds strongly coordinate with metal centers, a decrease in catalytic activity and yield is often observed in the reaction system. To address this issue, this review provides insights into advances over the last ~30 years in bipyridine synthesis using metal complexes under both homogeneous and heterogeneous conditions. Moreover, strategies for bipyridine synthesis involving sulfur and phosphorous compounds are examined. These alternative pathways offer promising avenues for overcoming the challenges associated with traditional catalysis methods, providing a more comprehensive understanding of the synthesis landscape.
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Affiliation(s)
- Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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33
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Samha MH, Karas LJ, Vogt DB, Odogwu EC, Elward J, Crawford JM, Steves JE, Sigman MS. Predicting success in Cu-catalyzed C-N coupling reactions using data science. SCIENCE ADVANCES 2024; 10:eadn3478. [PMID: 38232169 PMCID: PMC10793951 DOI: 10.1126/sciadv.adn3478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 12/18/2023] [Indexed: 01/19/2024]
Abstract
Data science is assuming a pivotal role in guiding reaction optimization and streamlining experimental workloads in the evolving landscape of synthetic chemistry. A discipline-wide goal is the development of workflows that integrate computational chemistry and data science tools with high-throughput experimentation as it provides experimentalists the ability to maximize success in expensive synthetic campaigns. Here, we report an end-to-end data-driven process to effectively predict how structural features of coupling partners and ligands affect Cu-catalyzed C-N coupling reactions. The established workflow underscores the limitations posed by substrates and ligands while also providing a systematic ligand prediction tool that uses probability to assess when a ligand will be successful. This platform is strategically designed to confront the intrinsic unpredictability frequently encountered in synthetic reaction deployment.
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Affiliation(s)
- Mohammad H. Samha
- Department of Chemistry, University of Utah, 315 S. 1400 E., Salt Lake City, UT 84112, USA
| | - Lucas J. Karas
- Department of Chemistry, University of Utah, 315 S. 1400 E., Salt Lake City, UT 84112, USA
| | - David B. Vogt
- Department of Chemistry, University of Utah, 315 S. 1400 E., Salt Lake City, UT 84112, USA
| | - Emmanuel C. Odogwu
- Department of Chemistry, University of Utah, 315 S. 1400 E., Salt Lake City, UT 84112, USA
| | - Jennifer Elward
- Molecular Design, GlaxoSmithKline, 1250 S. Collegeville Rd., Collegeville, PA 19426, USA
| | - Jennifer M. Crawford
- Drug Substance Development, GlaxoSmithKline, 1250 S. Collegeville Rd., Collegeville, PA 19426, USA
| | - Janelle E. Steves
- Drug Substance Development, GlaxoSmithKline, 1250 S. Collegeville Rd., Collegeville, PA 19426, USA
| | - Matthew S. Sigman
- Department of Chemistry, University of Utah, 315 S. 1400 E., Salt Lake City, UT 84112, USA
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34
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Greenwood NS, Cerny NP, Deziel AP, Ellman JA. Synthesis of N-Acylsulfenamides from (Hetero)Aryl Iodides and Boronic Acids by One-Pot Sulfur-Arylation and Dealkylation. Angew Chem Int Ed Engl 2024; 63:e202315701. [PMID: 38015869 PMCID: PMC10813656 DOI: 10.1002/anie.202315701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/27/2023] [Accepted: 11/28/2023] [Indexed: 11/30/2023]
Abstract
A general one-pot approach to diverse N-acylsulfenamides from a common S-phenethylsulfenamide starting material is reported. This approach was demonstrated by C-S bond formation utilizing commercially abundant (hetero)aryl iodides and boronic acids to provide sulfilimine intermediates that undergo thermal elimination of styrene. In contrast, all prior approaches to N-acylsulfenamides rely on thiol inputs to introduce sulfenamide S-substituents. A broad scope of reaction inputs was demonstrated including for approved drugs and drug precursors with dense display of functionality. Several different types of sulfur functionalization were performed on a sulfenamide derived from a complex precursor of the blockbuster anticoagulant drug apixaban, highlighting the utility of this approach for the introduction of high oxidation state sulfur groups in complex bioactive compounds. Mechanistic studies established that the key styrene elimination step proceeds by a concerted elimination that does not require reagents or catalysts, and therefore, this one-pot approach should be applicable to the synthesis of N-acylsulfenamides utilizing diverse electrophiles and reaction conditions for C-S bond formation.
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Affiliation(s)
- Nathaniel S Greenwood
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT 06520, USA
| | - Nicholas P Cerny
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT 06520, USA
| | - Anthony P Deziel
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT 06520, USA
| | - Jonathan A Ellman
- Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT 06520, USA
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35
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Kancherla R, Muralirajan K, Dutta S, Pal K, Li B, Maity B, Cavallo L, Rueping M. Photoexcitation of Distinct Divalent Palladium Complexes in Cross-Coupling Amination Under Air. Angew Chem Int Ed Engl 2024; 63:e202314508. [PMID: 37956272 DOI: 10.1002/anie.202314508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/13/2023] [Accepted: 11/13/2023] [Indexed: 11/15/2023]
Abstract
The development of metal complexes that function as both photocatalyst and cross-coupling catalyst remains a challenging research topic. So far, progress has been shown in palladium(0) excited-state transition metal catalysis for the construction of carbon-carbon bonds where the oxidative addition of alkyl/aryl halides to zero-valent palladium (Pd0 ) is achievable at room temperature. In contrast, the analogous process with divalent palladium (PdII ) is uphill and endothermic. For the first time, we report that divalent palladium can act as a light-absorbing species that undergoes double excitation to realize carbon-nitrogen (C-N) cross-couplings under air. Differently substituted aryl halides can be applied in the mild, and selective cross-coupling amination using palladium acetate as both photocatalyst and cross-coupling catalyst at room temperature. Density functional theory studies supported by mechanistic investigations provide insight into the reaction mechanism.
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Affiliation(s)
- Rajesh Kancherla
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Krishnamoorthy Muralirajan
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Sayan Dutta
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Kuntal Pal
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Bo Li
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Bholanath Maity
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Luigi Cavallo
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Magnus Rueping
- KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
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36
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Zhou Y, Qiu L, Li J, Xie W. A General Copper Catalytic System for Suzuki-Miyaura Cross-Coupling of Unactivated Secondary and Primary Alkyl Halides with Arylborons. J Am Chem Soc 2023; 145:28146-28155. [PMID: 38085645 DOI: 10.1021/jacs.3c10628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Suzuki-Miyaura cross-couplings (SMC) are powerful tools for the construction of carbon-carbon bonds. However, the couplings of sp3-hybridized alkyl halides with arylborons often encounter several problematic issues such as sluggish oxidation addition of alkyl halides and competitive β-hydride elimination side pathways of metal-alkyl species. In precedent reports, copper is mainly utilized for the coupling of sp2-aryl halides, and the cross-couplings with unactivated alkyl halides are far less reported. Herein, we demonstrate that a high-efficiency copper system enabled the coupling of arylborons with various unactivated secondary and primary alkyl halides including bromides, iodides, and even robust chlorides. The present system features broad scope, excellent functionality tolerance, scalability, and practicality. Moreover, the current system could be applied for the late-stage functionalization of complex molecules in moderate to high efficiency.
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Affiliation(s)
- Yonglei Zhou
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| | - Liping Qiu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| | - Jian Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
| | - Weilong Xie
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, China
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37
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Li H, Bai T. Theoretical study of copper hydride complexes catalyzing terminal alkyne hydroalkylation for C(sp 2)-C(sp 3) bond formation. Dalton Trans 2023; 53:153-161. [PMID: 38018369 DOI: 10.1039/d3dt03514j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
This study applies Density Functional Theory (DFT) to theoretically investigate the reaction mechanism of a copper complex catalyst facilitating the reaction between a terminal alkyne and α-bromo amide, enabling the formation of E-alkenes through C(sp2)-C(sp3) coupling. Initially, the study explores the reaction mechanism, identifying the predominant reaction pathway and the rate-determining step. Next, we discuss the addition reaction mode of copper hydride with terminal alkynes, determining the causes of regional and stereoselectivity. Subsequently, the reaction mechanism between the alkenyl copper intermediate and α-bromo amide is examined, including the discussion of alkyl fragment activation and introduction methods. Furthermore, the role of NHC ligands in catalyzing the single electron transfer process for C-Br bond activation is investigated. Finally, we analyze and discuss the reasons for the high energy barrier of the non-radical pathway. These investigations not only deepen our understanding of the reaction mechanisms of terminal alkynes and α-bromo amide catalyzed by copper but also provide valuable guidance for the future design of more efficient catalysts and reaction conditions.
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Affiliation(s)
- Hui Li
- Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China.
- Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan, China
| | - Taiming Bai
- Key Laboratory of Chemical Engineering and Technology, State Ethnic Affairs Commission, North Minzu University, Yinchuan, China.
- Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan, China
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38
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Bao H, Wang L. Photoinduced Reduction of Nitroarenes and Tandem C-N Cross-Coupling with Haloarenes. Org Lett 2023. [PMID: 38047598 DOI: 10.1021/acs.orglett.3c03656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
An efficient photocatalytic C-N cross-coupling of nitroarenes with haloarenes has been developed using simple and cheap Ni(acac)2 as a cocatalyst. The reaction is confirmed as a stepwise process: (1) metal free photoinduced reduction of nitroarenes into aniline derivatives and (2) photo- and Ni-catalyzed C-N cross-coupling of anilines with haloarenes. The reaction conditions are simple and mild, giving high-value diarylamines with good to excellent yields and good functional group tolerance.
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Affiliation(s)
- Haoshi Bao
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-Sen University, No. 66, Gongchang Road, Shenzhen, Guangdong 518107, P. R. China
| | - Leifeng Wang
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-Sen University, No. 66, Gongchang Road, Shenzhen, Guangdong 518107, P. R. China
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39
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He N, Nakatani N, Hada M. How does multi-reference computation change the catalysis chemistry? DFT and CASPT2 studies of the Cu-catalysed coupling reactions between aryl iodides and β-diketones. Phys Chem Chem Phys 2023; 25:28871-28884. [PMID: 37853798 DOI: 10.1039/d3cp03418f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
The molecular mechanism of a Cu-catalysed coupling reaction was theoretically studied using density functional theory (DFT) and the complete active space self-consistent field method followed by the second-order perturbation theory (CASSCF/CASPT2) to investigate the effects of the strong electron correlation of the Cu centre on the reaction profile. Both DFT and CASSCF/CASPT2 calculations showed that the catalytic cycle proceeds via an oxidative addition (OA) reaction, followed by a reductive elimination (RE) reaction, where OA is the rate-determining step. Although the DFT-calculated activation energies of the OA and RE steps are highly dependent on the choice of functionals, the CASSCF/CASPT2 results are less affected by the choice of DFT-optimised geometries. Therefore, with a careful assessment based on the CASSCF/CASPT2 single-point energy evaluation, an optimal choice of the DFT geometry is of good qualitative use for energetics at the CASPT2 level of theory. Based on the changes in the electron populations of the 3d orbitals during the OA and RE steps, the characteristic features of the DFT-calculated electronic structure were qualitatively consistent with those calculated using the CASSCF method. Further electronic structure analysis by the natural orbital occupancy of the CASSCF wavefunction showed that the ground state is almost single-reference in this system and the strong electron correlation effect of the Cu centre can be dealt with using the MP2 or CCSD method, too. However, the slightly smaller occupation numbers of the 3dπ orbital in the course of reactions suggested that the electron correlation effect of the Cu(III) centre appears through the interaction between the 3dπ orbital and the C-I antibonding σ* orbital in the OA step, and between the 3dπ orbital and the Cu-C antibonding σ* orbital in the RE step.
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Affiliation(s)
- Nan He
- Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan.
| | - Naoki Nakatani
- Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan.
| | - Masahiko Hada
- Department of Chemistry, Faculty of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192-0397, Japan.
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40
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Wang W, Yan X, Ye F, Zheng S, Huang G, Yuan W. Nickel/Photoredox Dual-Catalyzed Regiodivergent Aminoalkylation of Unactivated Alkyl Halides. J Am Chem Soc 2023; 145:23385-23394. [PMID: 37824756 DOI: 10.1021/jacs.3c09705] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
A mild and regiodivergent aminoalkylation of unactivated alkyl halides is disclosed via a dual photoredox/nickel catalysis. Bipyridyl-type ligands without an ortho-substituent control the site-selective coupling at the original position, while ortho-disubstituted ligands tune the site-selectivity at a remote, unprefunctionalized position. Mechanistic studies combined with DFT calculations give insight into the mechanism and the origins of the ligand-controlled regioselectivity. Notably, this redox-neutral, regiodivergent alkyl-alkyl coupling features mild conditions, broad substrate scope for both alkyl coupling partners, and excellent site-selectivity and offers a straightforward way for α-alkylation of tertiary amines to synthesize structurally diverse alkylamines and value-added amino acid derivatives.
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Affiliation(s)
- Wenlong Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Xueyuan Yan
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, People's Republic of China
| | - Fu Ye
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Songlin Zheng
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Genping Huang
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, People's Republic of China
| | - Weiming Yuan
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
- Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen 518000, People's Republic of China
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41
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Ivantcova PM, Kirsanova AA, Polshakov VI, Lyssenko KA, Kudryavtsev KV. Pyrrolidine/Azepane Ring Expansion via Intramolecular Ullmann-Type Annulation/Rearrangement Cascade: Synthesis of Highly Functionalized 1 H-Benzazepines. Org Lett 2023; 25:7573-7577. [PMID: 37801732 DOI: 10.1021/acs.orglett.3c03030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/08/2023]
Abstract
5-Arylpyrrolidine-2-carboxylates with an ortho-halogen substituent at 5-aryl and an electron-withdrawing group at the C4 position of the pyrrolidine ring were transformed into 1H-benzo[b]azepine-2-carboxylates under Cu(I) promotion and microwave activation. Reaction promoter copper(I) thiophene-2-carboxylate has been generated in situ in the reaction's environment from Cu2O and thiophene-2-carboxylic acid. Functionalized 1H-benzo[b]azepine-2-carboxylates were obtained in racemic and optically active forms in 67-89% yields. Subsequent stereoselective 1,3-dipolar cycloaddition and an Ullmann-type annulation/rearrangement cascade (UARC) ensure a synthetic route to oligomeric optically active benzazepine species with a well-defined 3D-structure.
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Affiliation(s)
- Polina M Ivantcova
- Sirius University of Science and Technology, Olympic Ave 1, 354340 Sochi, Russian Federation
| | - Anna A Kirsanova
- Department of Chemistry, City University of Hong Kong, Tat Chee Ave 83, Kowloon Tong, Hong Kong
| | - Vladimir I Polshakov
- Faculty of Fundamental Medicine, Lomonosov Moscow State University, Lomonosovsky Ave 31/5, 119991 Moscow, Russian Federation
| | - Konstantin A Lyssenko
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, 119991 Moscow, Russian Federation
| | - Konstantin V Kudryavtsev
- Institute of Pharmacy and Medicinal Chemistry, Pirogov Russian National Research Medical University, Ostrovityanova Street 1, 117997 Moscow, Russian Federation
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42
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Geunes EP, Meinhardt JM, Wu EJ, Knowles RR. Photocatalytic Anti-Markovnikov Hydroamination of Alkenes with Primary Heteroaryl Amines. J Am Chem Soc 2023; 145:21738-21744. [PMID: 37787499 PMCID: PMC10589911 DOI: 10.1021/jacs.3c08428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
We report a light-driven method for the intermolecular anti-Markovnikov hydroamination of alkenes with primary heteroaryl amines. In this protocol, electron transfer between an amine substrate and an excited-state iridium photocatalyst affords an aminium radical cation (ARC) intermediate that undergoes C-N bond formation with a nucleophilic alkene. Integral to reaction success is the electronic character of the amine, wherein increasingly electron-deficient heteroaryl amines generate increasingly reactive ARCs. Counteranion-dependent reactivity is observed, and iridium triflate photocatalysts are employed in place of conventional iridium hexafluorophosphate complexes. This method exhibits broad functional group tolerance across 55 examples of N-alkylated products derived from pharmaceutically relevant heteroaryl amines.
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Affiliation(s)
- Eric P Geunes
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Jonathan M Meinhardt
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Emily J Wu
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Robert R Knowles
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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43
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Cheng Y, Li YX, Liu CH, Zhu YY, Lin W. Diaryl Dihydrophenazine-Based Porous Organic Polymers Enhance Synergistic Catalysis in Visible-Light-Driven Organic Transformations. Angew Chem Int Ed Engl 2023; 62:e202310470. [PMID: 37615272 DOI: 10.1002/anie.202310470] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/07/2023] [Accepted: 08/24/2023] [Indexed: 08/25/2023]
Abstract
Porous organic polymers (POPs) have emerged as a novel class of porous materials that are synthesized by the polymerization of various organic monomers with different geometries and topologies. The molecular tunability of organic building blocks allows the incorporation of functional units for photocatalytic organic transformations. Here, we report the synthesis of two POP-based photocatalysts via homopolymerization of vinyl-functionalized diaryl dihydrophenazine (DADHP) monomer (POP1) and copolymerization of vinyl-functionalized DADHP and 2,2'-bipyridine monomers (POP2). The fluorescence lifetimes of DADHP units in the POPs significantly increased, resulting in enhanced photocatalytic performances over homogeneous controls. POP1 is highly effective in catalysing visible-light-driven C-N bond forming cross-coupling reactions. Upon coordination with Ni2+ ions, POP2-Ni shows strong synergy between photocatalytic and Ni catalytic cycles due to the confinement effect within the POP framework, leading to high efficiency in energy, electron, and organic radical transfer. POP2-Ni displays excellent activity in catalysing C-P bond forming reactions between diarylphosphine oxides and aryl iodides. They increased the photocatalytic activities by more than 30-fold in C-N and C-P cross-coupling reactions. These POP catalysts were readily recovered via centrifugal separation and reused in six catalytic cycles without loss of activities. Thus, photosensitizer-based POPs provide a promising platform for heterogeneous photocatalytic organic transformations.
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Affiliation(s)
- Yan Cheng
- School of Chemistry and Chemical Engineering and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230009, China
| | - Yan-Xiang Li
- School of Chemistry and Chemical Engineering and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230009, China
| | - Chun-Hua Liu
- School of Chemistry and Chemical Engineering and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230009, China
| | - Yuan-Yuan Zhu
- School of Chemistry and Chemical Engineering and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, 193 Tunxi Road, Hefei, 230009, China
| | - Wenbin Lin
- Department of Chemistry, The University of Chicago, 929 E 57th Street, Chicago, IL 60637, USA
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44
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Chen SJ, He CQ, Kong M, Wang J, Lin S, Krska SW, Stahl SS. Accessing three-dimensional molecular diversity through benzylic C-H cross-coupling. NATURE SYNTHESIS 2023; 2:998-1008. [PMID: 38463240 PMCID: PMC10923599 DOI: 10.1038/s44160-023-00332-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 04/25/2023] [Indexed: 03/12/2024]
Abstract
Pharmaceutical and agrochemical discovery efforts rely on robust methods for chemical synthesis that rapidly access diverse molecules1,2. Cross-coupling reactions are the most widely used synthetic methods3, but these methods typically form bonds to C(sp2)-hybridized carbon atoms (e.g., amide coupling, biaryl coupling) and lead to a prevalence of "flat" molecular structures with suboptimal physicochemical and topological properties4. Benzylic C(sp3)-H cross-coupling methods offer an appealing strategy to address this limitation by directly forming bonds to C(sp3)-hybridized carbon atoms, and emerging methods exhibit synthetic versatility that rivals conventional cross-coupling methods to access products with drug-like properties. Here, we use a virtual library of >350,000 benzylic ethers and ureas derived from benzylic C-H cross-coupling to test the widely held view that coupling at C(sp3)-hybridized carbon atoms affords products with improved three-dimensionality. The results show that the conformational rigidity of the benzylic scaffold strongly influences the product dimensionality. Products derived from flexible scaffolds often exhibit little or no improvement in three-dimensionality, unless they adopt higher energy conformations. This outcome introduces an important consideration when designing routes to topologically diverse molecular libraries. The concepts elaborated herein are validated experimentally through an informatics-guided synthesis of selected targets and the use of high-throughput experimentation to prepare a library of three-dimensional products that are broadly distributed across drug-like chemical space.
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Affiliation(s)
- Si-Jie Chen
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI, USA
- Department of Discovery Chemistry, Merck & Co., Inc., South San Francisco, CA, USA
| | - Cyndi Qixin He
- Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, NJ, USA
| | - May Kong
- Department of Discovery Chemistry, Merck & Co., Inc., South San Francisco, CA, USA
| | - Jun Wang
- Department of Discovery Chemistry, Merck & Co., Inc., South San Francisco, CA, USA
| | - Shishi Lin
- Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, NJ, USA
| | - Shane W. Krska
- Department of Discovery Chemistry, Merck & Co., Inc., Kenilworth, NJ, USA
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI, USA
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45
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Luo Y, Li Y, Wu J, Xue XS, Hartwig JF, Shen Q. Oxidative addition of an alkyl halide to form a stable Cu(III) product. Science 2023; 381:1072-1079. [PMID: 37676952 PMCID: PMC10658983 DOI: 10.1126/science.adg9232] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 08/10/2023] [Indexed: 09/09/2023]
Abstract
The step that cleaves the carbon-halogen bond in copper-catalyzed cross-coupling reactions remains ill defined because of the multiple redox manifolds available to copper and the instability of the high-valent copper product formed. We report the oxidative addition of α-haloacetonitrile to ionic and neutral copper(I) complexes to form previously elusive but here fully characterized copper(III) complexes. The stability of these complexes stems from the strong Cu-CF3 bond and the high barrier for C(CF3)-C(CH2CN) bond-forming reductive elimination. The mechanistic studies we performed suggest that oxidative addition to ionic and neutral copper(I) complexes proceeds by means of two different pathways: an SN2-type substitution to the ionic complex and a halogen-atom transfer to the neutral complex. We observed a pronounced ligand acceleration of the oxidative addition, which correlates with that observed in the copper-catalyzed couplings of azoles, amines, or alkynes with alkyl electrophiles.
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Affiliation(s)
- Yongrui Luo
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, PR China
| | - Yuli Li
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, PR China
| | - Jian Wu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, PR China
| | - Xiao-Song Xue
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, PR China
| | - John F. Hartwig
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Qilong Shen
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, PR China
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46
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Delaney CP, Lin E, Huang Q, Yu IF, Rao G, Tao L, Jed A, Fantasia SM, Püntener KA, Britt RD, Hartwig JF. Cross-coupling by a noncanonical mechanism involving the addition of aryl halide to Cu(II). Science 2023; 381:1079-1085. [PMID: 37676958 DOI: 10.1126/science.adi9226] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 08/08/2023] [Indexed: 09/09/2023]
Abstract
Copper complexes are widely used in the synthesis of fine chemicals and materials to catalyze couplings of heteroatom nucleophiles with aryl halides. We show that cross-couplings catalyzed by some of the most active catalysts occur by a mechanism not previously considered. Copper(II) [Cu(II)] complexes of oxalamide ligands catalyze Ullmann coupling to form the C-O bond in aryl ethers by concerted oxidative addition of an aryl halide to Cu(II) to form a high-valent species that is stabilized by radical character on the oxalamide ligand. This mechanism diverges from those involving Cu(I) and Cu(III) intermediates that have been posited for other Ullmann-type couplings. The stability of the Cu(II) state leads to high turnover numbers, >1000 for the coupling of phenoxide with aryl chloride electrophiles, as well as an ability to run the reactions in air.
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Affiliation(s)
- Connor P Delaney
- College of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Eva Lin
- College of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Qinan Huang
- College of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Isaac F Yu
- College of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Guodong Rao
- Department of Chemistry, University of California, Davis, Davis, CA 95616, USA
| | - Lizhi Tao
- Department of Chemistry, University of California, Davis, Davis, CA 95616, USA
| | - Ana Jed
- College of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Serena M Fantasia
- Pharmaceutical Division, Synthetic Molecules Technical Development, Process Chemistry and Catalysis, F. Hoffmann-La Roche, Ltd., Basel, CH-4070, Switzerland
| | - Kurt A Püntener
- Pharmaceutical Division, Synthetic Molecules Technical Development, Process Chemistry and Catalysis, F. Hoffmann-La Roche, Ltd., Basel, CH-4070, Switzerland
| | - R David Britt
- Department of Chemistry, University of California, Davis, Davis, CA 95616, USA
- Miller Institute for Basic Research in Science, University of California, Berkeley, CA 94720, USA
| | - John F Hartwig
- College of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
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47
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Kaplanai E, Tonis E, Drymona M, Zagranyarski Y, Tzeli D, Vougioukalakis GC. Microwave-Assisted, Copper-Catalyzed Domino O-H/C-H Arylation Reaction toward the Synthesis of Oxygen-Doped Polyaromatic Molecules. J Org Chem 2023; 88:11552-11561. [PMID: 37494595 DOI: 10.1021/acs.joc.3c00830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
Benzoxanthenes and their analogues are a very important class of compounds mainly due to their wide range of biological and technological applications. The development of a new methodology for their synthesis, involving an Ullmann-type coupling followed by an intramolecular C-H arylation, catalyzed by copper in a domino fashion, is reported. A variety of para-substituted phenols are amenable to this methodology, affording the desired products in moderate to good yields. Our protocol is expedient and practical and is carried out under microwave irradiation in only 3 min under air. A plausible catalytic cycle is proposed based on experimental mechanistic investigations and density functional theory (DFT) calculations.
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Affiliation(s)
- Entzy Kaplanai
- Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis, 15771 Athens, Greece
| | - Efstathios Tonis
- Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis, 15771 Athens, Greece
| | - Maria Drymona
- Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis, 15771 Athens, Greece
| | - Yulian Zagranyarski
- Department of Chemistry and Pharmacy, "St. Kliment Ohridski" University of Sofia, Bul. J. Baurchier 1, 1164 Sofia, Bulgaria
| | - Demeter Tzeli
- Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis, 15771 Athens, Greece
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Vassileos Constantinou Avenue 48, 11635 Athens, Greece
| | - Georgios C Vougioukalakis
- Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis, 15771 Athens, Greece
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48
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Abstract
Bimolecular nucleophilic substitution SN2 is the earliest and most important means of amination of alkyl electrophiles; its practical utilization is largely limited to primary or activated substrates. Furthermore, a persistent challenge lies in establishing C(sp3)-N bonds from alkyl substrates in cross-coupling chemistry using palladium and nickel catalysts. Therefore, the methods of constructing C(sp3)-N bonds remain rare from alkyl electrophiles. The existing routes are limited to copper catalysis and photoredox catalysis. Here, we demonstrate an alternative amination strategy for rapid construction of C(sp3)-N bonds from accessible alkyl electrophiles, which were used as radical precursors under nickel catalysis by Ni (III) species reductive eliminations in high efficiency.
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Affiliation(s)
- Qing Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xiangzhang Tao
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Shengyang Ni
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yi Pan
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yi Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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Nabar KU, Bhanage BM, Dawande SG. Copper-catalyzed N-arylation of amines with aryliodonium ylides in water. Beilstein J Org Chem 2023; 19:1008-1014. [PMID: 37440786 PMCID: PMC10334208 DOI: 10.3762/bjoc.19.76] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 06/20/2023] [Indexed: 07/15/2023] Open
Abstract
Copper sulfate catalyzed an efficient, inexpensive, and environment-friendly protocol that has been developed for N-arylation of amines with 1,3-cyclohexadione-derived aryliodonium ylides in water as a green solvent. Aromatic primary amines substituted with electron-donating as well as electron-withdrawing groups on the aryl ring reacted smoothly with iodonium ylides to give the corresponding diarylamines with good to excellent yields. Also, secondary amines underwent N-arylation to deliver tertiary amines with moderate yields.
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Affiliation(s)
- Kasturi U Nabar
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga East, Mumbai-400019, Maharashtra, India
| | - Bhalchandra M Bhanage
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga East, Mumbai-400019, Maharashtra, India
| | - Sudam G Dawande
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamilnadu, India
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Greenwood NS, Ellman JA. Sulfur-Arylation of Sulfenamides via Ullmann-Type Coupling with (Hetero)aryl Iodides. Org Lett 2023; 25:4759-4764. [PMID: 37338140 PMCID: PMC10330900 DOI: 10.1021/acs.orglett.3c01874] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Sulfur-(hetero)arylation of sulfenamides with commercially abundant (hetero)aryl iodides by Ullmann-type coupling with inexpensive copper(I) iodide as the catalyst is reported. A broad scope of reaction inputs was demonstrated, including both aryl and alkyl sulfenamides and highly sterically hindered aryl and 5- and 6-membered ring heteroaryl iodides. Relevant to many bioactive high oxidation state sulfur compounds, the (hetero)arylation of S-methyl sulfenamides is reported, including for complex aryl iodides. Smiles rearrangement of electron-deficient S-heteroaryl sulfilimines is also disclosed.
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Affiliation(s)
| | - Jonathan A. Ellman
- Department of Chemistry, Yale University, New Haven, Connecticut, 06520, United States
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