1
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Ning C, Yu Z, Shi M, Wei Y. Palladium-catalyzed selective C-C bond cleavage of keto-vinylidenecyclopropanes: construction of structurally rich dihydrofurans and tetrahydrofurans. Chem Sci 2024; 15:9192-9200. [PMID: 38903235 PMCID: PMC11186342 DOI: 10.1039/d4sc02536a] [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: 04/17/2024] [Accepted: 05/14/2024] [Indexed: 06/22/2024] Open
Abstract
Palladium-catalyzed selective cleavage of the distal C-C bond and proximal C-C bond of keto-vinylidenecyclopropanes by altering the sterically bulky phosphine ligands has been realized. The proximal C-C bond cleavage can be achieved by using dtbpf as a phosphine ligand, affording bicyclic products containing dihydrofuran skeletons in good yields along with broad substrate scope. In proximal C-C bond cleavage reactions, the eight-membered cyclic palladium intermediate plays a key role in the reaction. The [3 + 2] cycloaddition of keto-vinylidenecyclopropanes through the distal C-C bond cleavage can be effectively accomplished with t BuXPhos as a phosphine ligand and ZnCl2 as an additive, delivering bicyclic products containing tetrahydrofuran skeletons in good yields. The further transformation of these bicyclic products has been demonstrated, and the reaction mechanisms of two different C-C bond cleavage reactions have been investigated by control experiments and DFT calculations.
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Affiliation(s)
- Chao Ning
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry & Molecular Engineering, East China University of Science and Technology Meilong Road No.130 Shanghai 200237 China
| | - Ziqi Yu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry & Molecular Engineering, East China University of Science and Technology Meilong Road No.130 Shanghai 200237 China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, School of Chemistry & Molecular Engineering, East China University of Science and Technology Meilong Road No.130 Shanghai 200237 China
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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2
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Yao M, Dong S, Xu X. Asymmetric Carbene Transformations for the Construction of All-Carbon Quaternary Centers. Chemistry 2024; 30:e202304299. [PMID: 38366703 DOI: 10.1002/chem.202304299] [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: 12/22/2023] [Revised: 01/26/2024] [Accepted: 02/14/2024] [Indexed: 02/18/2024]
Abstract
Asymmetric catalytic carbene reactions have been well documented in the last few decades for the expeditious assembly of chiral molecules with structural diversity. However, the enantioselective construction of all-carbon quaternary centers remains a challenge in this area. In this review article, two types of asymmetric carbene reactions that beyond cyclopropanation, cyclopropenation, and Büchner reaction, have been summarized for the construction of all-carbon quaternary centers: 1) using carbene species as a 1C synthon that reacts with a trisubstituted prochiral center; 2) sequential installation of two different C-C bonds on the carbene position, which features a gem-difunctionalization reaction. Especially, the asymmetric metal carbene gem-dialkylation process, which has emerged as a practical and versatile method for the expeditious assembly of complex architectures from readily available chemical resources, is a complementary approach for the expeditious assembly of all-carbon quaternary centers.
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Affiliation(s)
- Minghan Yao
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Shanliang Dong
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
| | - Xinfang Xu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China
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3
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Pegu C, Paroi B, Patil NT. Enantioselective merged gold/organocatalysis. Chem Commun (Camb) 2024. [PMID: 38451222 DOI: 10.1039/d4cc00114a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Gold complexes, because of their unique carbophilic nature, have evolved as efficient catalysts for catalyzing various functionalization reactions of C-C multiple bonds. However, the realization of enantioselective transformations via gold catalysis remains challenging due to the geometrical constraints and coordination behaviors of gold complexes. In this context, merged gold/organocatalysis has emerged as one of the intriguing strategies to achieve enantioselective transformations which could not be possible by using a single catalytic system. Historically, in 2009, this field started with the merging of gold with axially chiral Brønsted acids and chiral amines to achieve enantioselective transformations. Since then, based on the unique reactivity profiles offered by each catalyst, several reports utilizing gold in conjunction with various chiral organocatalysts such as amines, Brønsted acids, N-heterocyclic carbenes, hydrogen-bonding and phosphine catalysts have been documented in the literature. This article demonstrates an up-to-date development in this field, especially focusing on the mechanistic interplay of gold catalysts with chiral organocatalysts.
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Affiliation(s)
- Chayanika Pegu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal-462066, India.
| | - Bidisha Paroi
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal-462066, India.
| | - Nitin T Patil
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal-462066, India.
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4
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Pavun A, Niess R, Scheibel LA, Seidl M, Hohloch S. A mesoionic carbene stabilized nickel(II) hydroxide complex: a facile precursor for C-H activation chemistry. Dalton Trans 2024; 53:2749-2761. [PMID: 38226674 DOI: 10.1039/d3dt03746k] [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
We report the synthesis of a new nickel(II) hydroxide complex 2 supported by a rigid, tridentate triazolylidene-carbazolid ligand. The complex can be accessed in high yields following a simple and stepwise extraction protocol using dichloromethane and aqueous ammonium chloride followed by aqeous sodium hydroxide solution. We found that complex 2 is highly basic, undergoing various deprotonation/desilylation reactions with E-H and C-H acidic and silylated compounds. In this context we synthesized a variety of novel, functionalized nickel(II) complexes with trimethylsilylolate (3), trityl sulfide (4), tosyl amide (5), azido (6), pyridine (7), acetylide (8, 9), fluoroarene (10 & 11) and enolate (12) ligands. We furthermore found that 2 reacts with malonic acid dimethyl ester in a knoevennagel-type condensation reaction, giving access to a new enolate ligand in complex 13, consisting of two malonic acid units. Furthermore, complex 2 reacts with acetonitrile to form the cyanido complex 14. The formation of complexes 13 and 14 is particularly interesting, as they underline the potential of complex 2 in both C-C bond formation and cleavage reactions.
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Affiliation(s)
- Anna Pavun
- Universität Innsbruck, Department of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
| | - Raffael Niess
- Universität Innsbruck, Department of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
| | - Lucas A Scheibel
- Universität Innsbruck, Department of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
| | - Michael Seidl
- Universität Innsbruck, Department of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
| | - Stephan Hohloch
- Universität Innsbruck, Department of General, Inorganic and Theoretical Chemistry, Innrain 80-82, 6020 Innsbruck, Austria.
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5
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Sadaphal VA, Liu RS. Reactions of 1,3-Diphenyl Cyclopentadiene with α-Aryldiazo Ketones to Enable C-H Insertions versus [4 + 2]-Cycloadditions via Au Catalyst and P(C 6F 5) 3 Additive, Respectively. J Org Chem 2023; 88:14899-14910. [PMID: 37857361 DOI: 10.1021/acs.joc.3c01190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Two distinct reaction chemoselectivities were reported for the reactions of α-aryldiazo ketone with 1,3-diphenylcyclopentadiene using gold catalyst and phosphine additives, respectively. In the presence of gold catalyst, α-aryldiazo ketone forms gold carbenes initially that are trapped with this 1,3-disubstituted cyclopentadiene to afford C-H insertion products. In the presence of P(C6F5)3 additive, α-aryldiazo ketone forms diarylketenes initially at elevated temperature, which are further stabilized by P(C6F5)3 to secure their entity before proceeding to unprecedented [4C + 2C] cycloadditions.
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Affiliation(s)
- Vikas Ashokrao Sadaphal
- Frontier Research Center on Fundamental and Applied Science of Matters, Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC
| | - Rai-Shung Liu
- Frontier Research Center on Fundamental and Applied Science of Matters, Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC
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6
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Liu X, Yang Q, Wang Q, Wang Y. Rhodium(II)-Catalyzed Desaturative [3+2] Tandem Cyclization of Arylcycloalkanes with β-Dicarbonyls. Org Lett 2023; 25:2498-2503. [PMID: 37001031 DOI: 10.1021/acs.orglett.3c00672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
Synthetically important scaffolds, fused tricyclic frameworks containing a 2,3-cyclo[b]dihydrofuran unit, play a crucial role in drug discovery. In this study, we demonstrate that rhodium(II)/N-fluorobenzenesulfonimide can catalyze the in situ generation of highly reactive alkene intermediates from commonly accessible alkanes, which undergo intermolecular [3+2] tandem cyclization with the simultaneously generated β-dicarbonyl radical to synthesize a series of fused tricyclic frameworks containing a 2,3-cyclo[b]dihydrofuran unit with a quaternary carbon center.
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Affiliation(s)
- Xinyu Liu
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qi Yang
- College of Chemistry, Sichuan University, Chengdu 610041, China
| | - Qiwei Wang
- Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
- Department of Chemistry, Xihua University, Chengdu 610039, China
| | - Yuanhua Wang
- College of Chemistry, Sichuan University, Chengdu 610041, China
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7
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Mandal M, Pradhan R, Lourderaj U, Balamurugan R. Dodging the Conventional Reactivity of o-Alkynylanilines under Gold Catalysis for Distal 7- endo- dig Cyclization. J Org Chem 2023; 88:2260-2287. [PMID: 36744758 DOI: 10.1021/acs.joc.2c02668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A direct ring-closing strategy involving a less facile 7-endo-dig carbacyclization of o-alkynylaniline derivatives for the synthesis of benzo[b]azepines has been presented. The trivial well-documented 5-endo-dig cyclization in o-alkynylaniline derivatives due to high nucleophilicity of nitrogen has been overcome by using their vinylogous amides under gold catalysis to access a wide array of benzo[b]azepines in an atom economical way with excellent functional group compatibility. Deuterium scrambling experiments and DFT studies favor a mechanism involving stabilizing conformational change of the initially formed seven-membered vinyl gold intermediate through a key cyclopropyl gold carbene intermediate and its subsequent protodeauration mediated by the counter anion.
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Affiliation(s)
- Mou Mandal
- School of Chemistry, University of Hyderabad, Hyderabad, Telangana-500046, India
| | - Renuka Pradhan
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI, P.O. Jatni, Khurda, Odisha-752050, India
| | - Upakarasamy Lourderaj
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, HBNI, P.O. Jatni, Khurda, Odisha-752050, India
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8
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Liu X, Tang Z, Si Z, Zhang Z, Zhao L, Liu L. Enantioselective
para
‐C(sp
2
)−H Functionalization of Alkyl Benzene Derivatives via Cooperative Catalysis of Gold/Chiral Brønsted Acid**. Angew Chem Int Ed Engl 2022; 61:e202208874. [DOI: 10.1002/anie.202208874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Xun‐Shen Liu
- School of Chemistry and Molecular Engineering East China Normal University 500 Dongchuan Road Shanghai 200241 P. R. China
| | - Zhiqiong Tang
- School of Chemistry and Molecular Engineering East China Normal University 500 Dongchuan Road Shanghai 200241 P. R. China
| | - Zhi‐Yao Si
- School of Chemistry and Molecular Engineering East China Normal University 500 Dongchuan Road Shanghai 200241 P. R. China
| | - Zhikun Zhang
- School of Chemistry and Molecular Engineering East China Normal University 500 Dongchuan Road Shanghai 200241 P. R. China
| | - Lei Zhao
- School of Chemistry and Molecular Engineering East China Normal University 500 Dongchuan Road Shanghai 200241 P. R. China
| | - Lu Liu
- School of Chemistry and Molecular Engineering East China Normal University 500 Dongchuan Road Shanghai 200241 P. R. China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development East China Normal University 3663N Zhongshan Road Shanghai 200062 P. R. China
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9
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Liu XS, Tang Z, Si ZY, Zhang Z, Zhao L, Liu L. Enantioselective para‐C(sp2)−H Functionalization of Alkyl Benzene Derivatives via Cooperative Catalysis of Gold/Chiral Brønsted Acid. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xun-Shen Liu
- East China Normal University School of Chemistry and Molecular Engineering CHINA
| | - Zhiqiong Tang
- East China Normal University School of Chemistry and Molecular Engineering CHINA
| | - Zhi-Yao Si
- East China Normal University School of Chemistry and Molecular Engineering CHINA
| | - Zhikun Zhang
- East China Normal University School of Chemistry and Molecular Engineering CHINA
| | - Lei Zhao
- East China Normal University School of Chemistry and Molecular Engineering CHINA
| | - Lu Liu
- East China Normal University School of Chemistry and Molecular Engineering 500 Dongchuan Road 200241 Shanghai CHINA
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10
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Bernardo O, González J, Borge J, López LA. Gold-Catalyzed Regioselective Synthesis of Crowded Cyclopentadienes by Migratory Cycloisomerization of Vinylallenes. Org Lett 2022; 24:5203-5208. [PMID: 35819017 PMCID: PMC9490818 DOI: 10.1021/acs.orglett.2c02035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
We report the regioselective synthesis of silyl-substituted
cyclopentadienyl
esters through gold-catalyzed migratory cycloisomerization of silyl-substituted
vinylallenes. This transformation is proposed to proceed through a
perfectly orchestrated sequence of events including Nazarov-like cyclization
and several silyl and hydrogen rearrangements. Furthermore, exploiting
the multifaceted nature of the gold catalyst, we have also identified
suitable conditions for the synthesis of these cyclopentadienes in
a more straightforward manner through gold-catalyzed reaction of propargyl
esters and alkynylsilanes.
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Affiliation(s)
- Olaya Bernardo
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Química Organometálica "Enrique Moles" and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Oviedo, Julián Clavería 8, 33006 Oviedo, Spain
| | - Javier González
- Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo, Julián Clavería 8, 33006 Oviedo, Spain
| | - Javier Borge
- Departamento de Química Física y Analítica, Universidad de Oviedo, Julián Clavería 8, 33006 Oviedo, Spain
| | - Luis A López
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Química Organometálica "Enrique Moles" and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Oviedo, Julián Clavería 8, 33006 Oviedo, Spain
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11
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Sasane AV, Kuo TC, Cheng MJ, Liu RS. Gold-Catalyzed Rearrangement of α-Carbonyl Cyclopropanes to Form 3-(Cyclopenta-1,3-dien-1-ylmethyl)oxindoles via a Postulated 1,5-Enolate Shift. Org Lett 2022; 24:5220-5225. [PMID: 35816021 DOI: 10.1021/acs.orglett.2c02117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Gold-catalyzed stereoselective synthesis of spirocyclopropyl oxindoles from diazooxindoles and 1,2,4-substituted dienes is described. The aim of this work is to report a novel rearrangement of these spirocyclopropyl oxindoles with a gold catalyst to yield 3-(cyclopenta-1,3-dien-1-ylmethyl)oxindoles. Our experimental data exclude a reversible process in the gold-catalyzed cyclopropanation. With DFT calculations, we postulate a rearrangement mechanism involving the formation of complex pairs of gold enolates and 1-methylen-2,3,4-cyclopentadienyl cations, leading to a 1,5-enolate shift.
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Affiliation(s)
- Amit Vijay Sasane
- Frontier Center for Material Science and Technology and Department of Chemistry, National Tsing-Hua University, Hsinchu 30013, Taiwan, R.O.C
| | - Tung-Chun Kuo
- Department of Chemistry, National Cheng Kung University, Tainan 70101, Taiwan, R.O.C
| | - Mu-Jeng Cheng
- Department of Chemistry, National Cheng Kung University, Tainan 70101, Taiwan, R.O.C
| | - Rai-Shung Liu
- Frontier Center for Material Science and Technology and Department of Chemistry, National Tsing-Hua University, Hsinchu 30013, Taiwan, R.O.C
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12
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Mutra MR, Wang JJ. Photoinduced ynamide structural reshuffling and functionalization. Nat Commun 2022; 13:2345. [PMID: 35487916 PMCID: PMC9055057 DOI: 10.1038/s41467-022-30001-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 04/05/2022] [Indexed: 12/11/2022] Open
Abstract
The radical chemistry of ynamides has recently drawn the attention of synthetic organic chemists to the construction of various N-heterocyclic compounds. Nevertheless, the ynamide-radical chemistry remains a long-standing challenge for chemists due to its high reactivity, undesirable byproducts, severe inherent regio- and chemoselective problems. Importantly, the ynamide C(sp)-N bond fission remains an unsolved challenge. In this paper, we observe Photoinduced radical trigger regio- and chemoselective ynamide bond fission, structural reshuffling and functionalization of 2-alkynyl-ynamides to prepare synthetically inaccessible/challenging chalcogen-substituted indole derivatives with excellent step/atom economy. The key breakthroughs of this work includes, ynamide bond cleavage, divergent radical precursors, broad scope, easy to handle, larger-scale reactions, generation of multiple bonds (N-C(sp2), C(sp2)-C(sp2), C(sp2)-SO2R/C-SR, and C-I/C-Se/C-H) in a few minutes without photocatalysts, metals, oxidants, additives. Control experiments and 13C-labeling experiments supporting the conclusion that sulfone radicals contribute to ynamide structural reshuffling processes via a radical pathway. Although ynamides have emerged as a versatile class of compounds for organic synthesis, the radical chemistry of ynamides usually proceeds with the expected connectivity largely intact. Here the authors show a methodology by which the C(sp)–N bond undergoes scission, alkyne migration and functionalization under blue LED light in the absence of metals or additives.
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Affiliation(s)
- Mohana Reddy Mutra
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, No. 100, Shih-Chuan 1st Rd, Sanmin District, Kaohsiung City, 807, Taiwan
| | - Jeh-Jeng Wang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, No. 100, Shih-Chuan 1st Rd, Sanmin District, Kaohsiung City, 807, Taiwan. .,Department of Medical Research, Kaohsiung Medical University Hospital, No. 100, Tzyou 1st Rd, Sanmin District, Kaohsiung City, 807, Taiwan.
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13
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Xu G, Huang M, Zhang T, Shao Y, Tang S, Cao H, Zhang X, Sun J. Asymmetric Arylation of Diazoesters with Anisoles Enabled by Cooperative Gold and Phosphoric Acid Catalysis. Org Lett 2022; 24:2809-2814. [PMID: 35394288 DOI: 10.1021/acs.orglett.2c00709] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An enantioselective insertion of a carbene into the Csp2-H bond of anisole derivatives has been accomplished using an achiral gold complex and a chiral phosphoric acid as the catalytic system, providing a novel protocol for the synthesis of chiral α,α-diaryl acetates. Density functional theory calculations reveal the reactivity and the origin of the enantioselectivity of this reaction.
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Affiliation(s)
- Guangyang Xu
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Meirong Huang
- Shenzhen Bay Laboratory, State Key Laboratory of Chemical Oncogeomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Tao Zhang
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Ying Shao
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Shengbiao Tang
- School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
| | - He Cao
- Longhua District Center for Disease Control and Prevention, Shenzhen, Guangdong 518109, China
| | - Xinhao Zhang
- Shenzhen Bay Laboratory, State Key Laboratory of Chemical Oncogeomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong 518055, China
| | - Jiangtao Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu 213164, China
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14
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Zhang C, Zhang XQ, Nie Y, Wang C, Xu T, Zhang J, Bai L, Feng C, Wang Y. Gold-catalyzed formal (3 + 2) and (4 + 2) cycloaddition reactions using propiolates: assembly of 2,3-dihydrofurans and 3,4-dihydropyrans via a multistep cascade process. Org Chem Front 2022. [DOI: 10.1039/d2qo01084d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A gold-catalyzed formal dipolar cycloaddition reaction was developed using polarized alkynes as dipolarophiles and butenediol or pentenediol derivatives as formal dipoles. Silyl groups were used to solve the selectivity issue of unsymmetrical diols.
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Affiliation(s)
- Congdi Zhang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Xiao-Qian Zhang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Yu Nie
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Chao Wang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Tianyi Xu
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Junjie Zhang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
| | - Lu Bai
- Instrumental Analysis Center, Xi'an Jiaotong University, No.28, West Xianning Road, Xi'an, Shaanxi, 710049, P.R. China
| | - Chao Feng
- Instrumental Analysis Center, Xi'an Jiaotong University, No.28, West Xianning Road, Xi'an, Shaanxi, 710049, P.R. China
| | - Youliang Wang
- School of Chemistry, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University (XJTU), Xi'an, 710049, China
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15
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Tanpure SD, Kuo TC, Cheng MJ, Liu RS. Gold(I)-Catalyzed Highly Diastereo- and Enantioselective Constructions of Bicyclo[3.2.1]oct-6-ene Frameworks via (4 + 3)-Cycloadditions. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04483] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Sudhakar Dattatray Tanpure
- Frontier Research Center for Matter Science and Technology, Department of Chemistry, National Tsing-Hua University, Hsinchu 300, Taiwan, ROC
| | - Tung-Chun Kuo
- Department of Chemistry, National Cheng Kung University, East District, Tainan City 701, Taiwan, ROC
| | - Mu-Jeng Cheng
- Department of Chemistry, National Cheng Kung University, East District, Tainan City 701, Taiwan, ROC
| | - Rai-Shung Liu
- Frontier Research Center for Matter Science and Technology, Department of Chemistry, National Tsing-Hua University, Hsinchu 300, Taiwan, ROC
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Chen JX, Jadhav PD, Chen CN, Liu RS. Development of a [2 + 2]-Nitroso/Alkene Cycloaddition Using Sodium Tetrakis[3,5-bis(trifluoromethyl)phenyl]borate Catalyst: Controlled Chemoselectivity of Two Equilibrating Isomeric Intermediates. Org Lett 2021; 23:6246-6251. [PMID: 34351170 DOI: 10.1021/acs.orglett.1c01987] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Sodium tetrakis[3,5-bis(trifluoromethyl)-phenyl]borate (NaBArF) catalyzes the [2 + 2] cycloaddition of 1,4-disubstituted cyclopenta-1,3-dien-2-yl esters with nitrsobenzene in toluene, affording two isolable regioisomers of 6-oxa-7-azabicyclo[3.2.0] heptanes, which thermally rearrange into the same 4-aminocyclopent-1-en-3-ones. In the case of 4-substituted cyclopenta-1,3-dien-2-yl esters, their initial [2 + 2] cycloaddition intermediates undergo a rapid ring expansion to afford six-membered piperidone derivatives efficiently.
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Affiliation(s)
- Jia-Xuan Chen
- Frontier Research Center of Matter Science and Technology, Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan 30013, Republic of China
| | - Prakash D Jadhav
- Frontier Research Center of Matter Science and Technology, Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan 30013, Republic of China
| | - Ching-Nung Chen
- Frontier Research Center of Matter Science and Technology, Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan 30013, Republic of China
| | - Rai-Shung Liu
- Frontier Research Center of Matter Science and Technology, Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan 30013, Republic of China
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Song L, Tian X, Han C, Amanpur M, Rominger F, Hashmi ASK. Catalyst-free synthesis of oxazol-2(3 H)-ones from sulfilimines and diazo compounds through a tandem rearrangement/aziridination/ring-expansion reaction. Org Chem Front 2021. [DOI: 10.1039/d1qo00473e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Oxazol-2(3H)-ones play a significant role in the fields of organic synthesis and drug development.
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Affiliation(s)
- Lina Song
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Xianhai Tian
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Chunyu Han
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Mehran Amanpur
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - Frank Rominger
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
| | - A. Stephen K. Hashmi
- Institute of Organic Chemistry
- Heidelberg University
- 69120 Heidelberg
- Germany
- Chemistry Department
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