1
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Nikitjuka A, Ozola M, Krims-Davis K, Žalubovskis R. Design, Synthesis, and Bioactivity Evaluations of 3-Methylenechroman-2-one Derivatives as Thioredoxin Reductase (TrxR) Inhibitors. ChemMedChem 2024; 19:e202300504. [PMID: 38063319 DOI: 10.1002/cmdc.202300504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/23/2023] [Indexed: 02/03/2024]
Abstract
We aimed to design and synthesize 3-methylenechroman-2-one derivatives and test their potency as TrxR1 inhibitors. A convenient and easy-to-handle synthetic approach to 3-methylenechroman-2-ones was developed. The in vitro inhibitory activity towards recombinant TrxR1 was determined for the obtained compounds. The most potent representatives exhibited submicromolar TrxR1 inhibition activity (IC50 varied from 0.29 μM to 10.2 μM). Structure-activity relationship analysis indicates the beneficial role of the substituent at the position C-6 of the core of chroman-2-one, where the derivatives containing halogen are the most active among the scope of compounds obtained. The most potent TrxR1 inhibitor of the series was further examined in in vitro cell-based assays to assess cytotoxic effects on various cancer cell lines, and to evaluate their influence on cell apoptosis.
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Affiliation(s)
- Anna Nikitjuka
- Latvian Institute of Organic Synthesis, Aizkraukles 21, 1006, Riga, Latvia
| | - Melita Ozola
- Latvian Institute of Organic Synthesis, Aizkraukles 21, 1006, Riga, Latvia
- Faculty of Pharmacy, Rīga Stradiņš University, Konsula 21, 1007, Riga, Latvia
| | | | - Raivis Žalubovskis
- Latvian Institute of Organic Synthesis, Aizkraukles 21, 1006, Riga, Latvia
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, P. Valdena iela 3, 1048, Riga, Latvia
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2
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Ramarao J, Behera PC, Reddy MS, Suresh S. Carbene-Catalyzed Tandem Imine Umpolung-Intramolecular Aza-Conjugate Addition-Oxidation to Access N-Substituted Isoindolinones. J Org Chem 2024; 89:414-424. [PMID: 38148719 DOI: 10.1021/acs.joc.3c02187] [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
Herein, we have described a novel N-heterocyclic carbene (NHC)-catalyzed synthesis of N-substituted isoindolinone acetates. The presented transformation proceeds through NHC-catalyzed tandem imine umpolung-intramolecular aza-Michael addition followed by oxidation, while molecular oxygen in air acts as a sole oxidant. Atom efficiency, operational simplicity, large-scale syntheses, and mild reaction conditions are the salient features of this method. Mechanistic studies were indicative of the necessity of molecular oxygen in air as oxidant for the conversion of imine to amide.
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Affiliation(s)
- Jakkula Ramarao
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Purna Chandra Behera
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Manyam Subbi Reddy
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Surisetti Suresh
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad 500 007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
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3
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Fang J, Pan Z, Liu T, Rao Y, Jiang H, Ma Y. I 2-mediated coupling of quinazolinone enamines with 2-aminopyridines: a new strategy to access spiroquinazolinones. Org Biomol Chem 2023; 21:2355-2360. [PMID: 36847115 DOI: 10.1039/d3ob00083d] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Herein, we report a novel, rapid and efficient route to the spiroquinazolinone framework via an umpolung strategy mediated by molecular iodine. A library of functionalized spiroquinazolinone iodide salts was synthesized in moderate to good yields under ambient, metal-free and mild conditions. The current methodology opens up a new efficient and concise strategy for the construction of spiroquinazolinones.
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Affiliation(s)
- Jingxi Fang
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Zhentao Pan
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Tong Liu
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Yingbo Rao
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Huajiang Jiang
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Yongmin Ma
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
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4
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Xu YY, Gao ZH, Li CB, Ye S. Enantioselective N-Heterocyclic Carbene Catalyzed α-Oxidative Coupling of Enals with Carboxylic Acids Using an Iodine(III) Reagent. Angew Chem Int Ed Engl 2023; 62:e202218362. [PMID: 36651829 DOI: 10.1002/anie.202218362] [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: 12/12/2022] [Revised: 01/18/2023] [Accepted: 01/18/2023] [Indexed: 01/19/2023]
Abstract
The enantioselective α-oxidative coupling of enals with carboxylic acids was developed via the umpolung of an NHC-bound enolate with an iodine(III) reagent. The corresponding α-acyloxyl-β,γ-unsaturated esters were afforded in good yields, with high regio- and enantioselectivities. The key step of the reaction involves the formation of enol iodine(III) intermediate from the enolate with iodosobenzene, which changes the polarity of α-carbon of the enal from nucleophilic to electrophilic, and thus facilitates the subsequent addition of carboxylate.
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Affiliation(s)
- Yuan-Yuan Xu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zhong-Hua Gao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Cao-Bo Li
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Song Ye
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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5
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Shee S, Sarkar D, Biju AT. N-Heterocyclic Carbene-Catalyzed Aza-Michael-Mannich-Lactamization Cascade for the Enantioselective Synthesis of Pyrazoloquinolin-3-ones. Org Lett 2023; 25:220-225. [PMID: 36594720 DOI: 10.1021/acs.orglett.2c04070] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The enantioselective synthesis of functionalized pyrazoloquinolin-3-ones via N-heterocyclic carbene-catalyzed cascade reaction of α-bromoenals with 2-aminoaryl N-tosyl hydrazones is reported. The in situ-generated α,β-unsaturated acylazoliums underwent an aza-Michael-Mannich-lactamization sequence to afford the tricyclic products bearing three contiguous stereocenters, including a sterically demanding quaternary stereocenter with high enantioselectivity. The unprotected amine-triggered aza-Michael pathway over the competing amidation pathway is noteworthy.
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Affiliation(s)
- Sayan Shee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Deeptanu Sarkar
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
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6
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Yang X, Wei L, Wu Y, Zhou L, Zhang X, Chi YR. Atroposelective Access to 1,3-Oxazepine-Containing Bridged Biaryls via Carbene-Catalyzed Desymmetrization of Imines. Angew Chem Int Ed Engl 2023; 62:e202211977. [PMID: 36087019 DOI: 10.1002/anie.202211977] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Indexed: 02/02/2023]
Abstract
We disclose herein an atroposelective synthesis of novel bridged biaryls containing medium-sized rings via N-heterocyclic carbene organocatalysis. The reaction starts with addition of the carbene catalyst to the aminophenol-derived aldimine substrate. Subsequent oxidation and intramolecular desymmetrization lead to the formation of 1,3-oxazepine-containing bridged biaryls in good yields and excellent enantioselectivities. These novel bridged biaryl products can be readily transformed into chiral phosphite ligands. Preliminary density function theory calculations suggest that the origin of enantioselectivity arises from the more favorable frontier molecular orbital interactions in the transition state leading to the major product.
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Affiliation(s)
- Xing Yang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine (Ministry of Educational of China), Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, and Key Laboratory of Phytochemistry R&D of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, P. R. China
| | - Liwen Wei
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine (Ministry of Educational of China), Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, and Key Laboratory of Phytochemistry R&D of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, P. R. China
| | - Yuelin Wu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine (Ministry of Educational of China), Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, and Key Laboratory of Phytochemistry R&D of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, P. R. China
| | - Liejin Zhou
- Department of Chemistry, Zhejiang Normal University, Jinhua, 321004, P. R. China
| | - Xinglong Zhang
- Institute of High Performance Computing, Agency for Science, Technology and Research (A*STAR), Singapore, 138632, Singapore
| | - Yonggui Robin Chi
- Division of Chemistry & Mathematical Science, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore.,Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University Huaxi District, Guiyang, 550025, P. R. China
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7
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Barik S, Shee S, Biju AT. N-Heterocyclic Carbene-Catalyzed Umpolung of Cyclopent-4-ene-1,3-diones for Activated Olefin-Isatin Cross-Coupling. Org Lett 2022; 24:6066-6071. [PMID: 35930323 DOI: 10.1021/acs.orglett.2c02413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
N-Heterocyclic carbene (NHC)-catalyzed umpolung of cyclopent-4-ene-1,3-diones that proceeds via the generation of nucleophilic deoxy-Breslow intermediates is presented. The carbene generated from a commercially available thiazolium salt catalyzed the cross-coupling between cyclopent-4-ene-1,3-diones and isatins to furnish the functionalized oxindoles in moderate to good yields with good functional group compatibility. The key deoxy-Breslow intermediates were isolated and characterized by X-ray analysis. Detailed mechanistic studies are also presented.
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Affiliation(s)
- Shilpa Barik
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Sayan Shee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
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8
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Yuan WC, Yang L, Zhao JQ, Du HY, Wang ZH, You Y, Zhang YP, Liu J, Zhang W, Zhou MQ. Copper-Catalyzed Umpolung of N-2,2,2-Trifluoroethylisatin Ketimines for the Enantioselective 1,3-Dipolar Cycloaddition with Benzo[ b]thiophene Sulfones. Org Lett 2022; 24:4603-4608. [PMID: 35704767 DOI: 10.1021/acs.orglett.2c01716] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A copper-catalyzed umpolung of N-2,2,2-trifluoroethylisatin ketimines for the enantioselective 1,3-dipolar cycloaddition with benzo[b]thiophene sulfones was developed. Using a catalyst system consisting of an (S,Sp)-tBu-Phosferrox ligand, Cu(OTf)2, and Cs2CO3, a range of pentacyclic spirooxindoles containing pyrrolidine and benzo[b]sulfolane subunits were obtained in high efficiency with excellent regio-, diastereo-, and enantioselectivites under mild conditions. The practicality and versatility of the reaction were also demonstrated.
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Affiliation(s)
- Wei-Cheng Yuan
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Lei Yang
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China.,National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
| | - Jian-Qiang Zhao
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Hong-Yan Du
- Institute of Forensic Science, Ministry of Public Security, Beijing 100038, China
| | - Zhen-Hua Wang
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Yong You
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Yan-Ping Zhang
- Innovation Research Center of Chiral Drugs, Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Jiabin Liu
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Wenjing Zhang
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Ming-Qiang Zhou
- National Engineering Research Center of Chiral Drugs, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
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9
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Peng Y, Chen L, Bao H, Zhou B, Wu H, Liu Y. Reactivity Umpolung of the C═N Bond in Quinoxaline Scaffold Enabling Direct Nucleophilic Attack of Alkyl Grignard Reagents at the N-Terminus. Org Lett 2022; 24:3982-3986. [PMID: 35648469 DOI: 10.1021/acs.orglett.2c01385] [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
The reactivity umpolung of the C═N bond in the quinoxaline scaffold has been successfully realized for the first time by introduction of a formyl or an acyl group adjacent to the C-position of the C═N moiety. The reversed reactivity of the C═N bond thus enabled direct nucleophilic attack of alkyl Grignard reagents at the N-terminus rather than the C-terminus, thereby providing an unprecedented and efficient method for the synthesis of quinoxalin-2(1H)-one derivatives involving a tandem N-alkylation/C─C bond cleavage process.
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Affiliation(s)
- Yun Peng
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Lailin Chen
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Hanyang Bao
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Bingwei Zhou
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Huayue Wu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325027, P. R. China
| | - Yunkui Liu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China
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10
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Liu C, Han P, Zhang X, Qiao Y, Xu Z, Zhang Y, Li D, Wei D, Lan Y. NHC-Catalyzed Transformation Reactions of Imines: Electrophilic versus Nucleophilic Attack. J Org Chem 2022; 87:7989-7994. [PMID: 35618673 DOI: 10.1021/acs.joc.2c00621] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
It is generally accepted that N-heterocyclic carbene (NHC)-catalyzed imine transformations are initiated by a nucleophilic attack (NA) by NHC. However, due to significant nucleophilicity of the iminyl nitrogen atom in imines, the electrophilic attack (EA) by electrophiles onto imine would also be a possible mechanism of these kinds of reactions. Therefore, we use the quantum mechanical approach to disclose that both the NA and EA modes could be switchable for a wide range of NHC-catalyzed transformations of imines.
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Affiliation(s)
- Chunhui Liu
- Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Xuchang, Henan 461000, China
| | - Peilin Han
- Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Xuchang, Henan 461000, China
| | - Xusheng Zhang
- Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Xuchang, Henan 461000, China
| | - Yan Qiao
- Department of Pathophysiology, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Zhihong Xu
- Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Xuchang, Henan 461000, China
| | - Yange Zhang
- Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Xuchang, Henan 461000, China
| | - Dapeng Li
- Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Xuchang, Henan 461000, China
| | - Donghui Wei
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Yu Lan
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China.,School of Chemistry and Chemical Engineering, Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, China
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11
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Wu T, Tatton MR, Greaney MF. NHC Catalysis for Umpolung Pyridinium Alkylation via Deoxy‐Breslow Intermediates. Angew Chem Int Ed Engl 2022; 61:e202117524. [PMID: 35103381 PMCID: PMC9306516 DOI: 10.1002/anie.202117524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Indexed: 12/24/2022]
Abstract
Umpolung N‐heterocyclic carbene (NHC) catalysis of non‐aldehyde substrates offers new pathways for C−C bond formation, but has proven challenging to develop in terms of viable substrate classes. Here, we demonstrate that pyridinium ions can undergo NHC addition and subsequent intramolecular C−C bond formation through a deoxy‐Breslow intermediate. The alkylation demonstrates, for the first time, that deoxy‐Breslow intermediates are viable for catalytic umpolung of areniums.
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Affiliation(s)
- Terence Wu
- School of Chemistry The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Matthew R. Tatton
- Early Chemical Development Pharmaceutical Sciences R&D, AstraZeneca Macclesfield SK10 2NA UK
| | - Michael F. Greaney
- School of Chemistry The University of Manchester Oxford Road Manchester M13 9PL UK
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12
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Wu T, Tatton MR, Greaney MF. NHC Catalysis for Umpolung Pyridinium Alkylation via Deoxy-Breslow Intermediates. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 134:e202117524. [PMID: 38504766 PMCID: PMC10947523 DOI: 10.1002/ange.202117524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Indexed: 11/09/2022]
Abstract
Umpolung N-heterocyclic carbene (NHC) catalysis of non-aldehyde substrates offers new pathways for C-C bond formation, but has proven challenging to develop in terms of viable substrate classes. Here, we demonstrate that pyridinium ions can undergo NHC addition and subsequent intramolecular C-C bond formation through a deoxy-Breslow intermediate. The alkylation demonstrates, for the first time, that deoxy-Breslow intermediates are viable for catalytic umpolung of areniums.
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Affiliation(s)
- Terence Wu
- School of ChemistryThe University of ManchesterOxford RoadManchesterM13 9PLUK
| | - Matthew R. Tatton
- Early Chemical DevelopmentPharmaceutical SciencesR&D, AstraZenecaMacclesfieldSK10 2NAUK
| | - Michael F. Greaney
- School of ChemistryThe University of ManchesterOxford RoadManchesterM13 9PLUK
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13
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Ramarao J, Yadav S, Satyam K, Suresh S. N-Heterocyclic carbene (NHC)-catalyzed oxidation of unactivated aldimines to amides via imine umpolung under aerobic conditions. RSC Adv 2022; 12:7621-7625. [PMID: 35424774 PMCID: PMC8982222 DOI: 10.1039/d2ra00897a] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 02/25/2022] [Indexed: 01/16/2023] Open
Abstract
Herein, we disclose an NHC-catalyzed aerobic oxidation of unactivated aldimines for the synthesis of amides via umpolung of imines proceeding through an aza-Breslow intermediate. We have developed an eco-friendly method for the conversion of imines to amides by using molecular oxygen in air as the sole oxidant and dimethyl carbonate (DMC) as a green solvent under mild reaction conditions. Broad substrate scope, high yields and gram scale syntheses expand the practicality of the developed method. A general NHC-catalyzed conversion of imines to amides proceeding through umpolung–oxidation under aerobic conditions in green solvent is reported.![]()
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Affiliation(s)
- Jakkula Ramarao
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500 007 India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Sanjay Yadav
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500 007 India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Killari Satyam
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500 007 India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Surisetti Suresh
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT) Hyderabad 500 007 India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
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14
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Zhang Y, Liu S, Zang Z, Wang Z, Zhu T. Carbene catalyzed C(sp 3)–Cl activation of chlorinated solvents for benzyne chlorination. Org Chem Front 2022. [DOI: 10.1039/d2qo01193j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A new mode of N-heterocyclic carbene (NHC) organocatalysis was discovered, in which the normally inert chlorinated solvents were activated by carbene to realize the chlorination of hexa-dehydro-Diels-Alder derived benzynes.
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Affiliation(s)
- Ying Zhang
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P.R. China
| | - Song Liu
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P.R. China
| | - Zhenming Zang
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P.R. China
| | - Ziyuan Wang
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P.R. China
| | - Tingshun Zhu
- School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P.R. China
- Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
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15
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Abstract
An efficient construction of amides through NHC-mediated oxidation of imines is described. This work has the advantages of wide scope, fast assembly and high yield, and can avoid the use of coupling agents, such as HATU, DCC, etc.
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Affiliation(s)
- Shaofa Sun
- College of Chemistry and Biological Sciences, Hubei University of Science and Technology, Hubei, 437100, China
| | - Donghui Guo
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, P. R. China
| | - Fangyi Li
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, P. R. China
| | - Jian Wang
- College of Chemistry and Biological Sciences, Hubei University of Science and Technology, Hubei, 437100, China
- School of Pharmaceutical Sciences, Tsinghua University, Beijing 100084, P. R. China
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16
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Cao X, Dai Y, Qin J, Qi X, Qin Y, Chen M, Ma J, Long Y. Ce-Doped α-FeOOH as a High-Performance Catalyst for Atom-Economic Synthesis of Imines: Enhanced Oxygen-Activating Capacity and Acidic Property. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c03918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiao Cao
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Yiwei Dai
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Jiaheng Qin
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Xin Qi
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Yao Qin
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Ming Chen
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Jiantai Ma
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
| | - Yu Long
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), Gansu Provincial Engineering Laboratory for Chemical Catalysis, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China
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17
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Mansour W, Suleiman R, Iali W, Fettouhi M, El Ali B. Synthesis, crystal structure, and catalytic activity of bridged-bis(N-heterocyclic carbene) palladium(II) complexes in selective Mizoroki-Heck cross-coupling reactions. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Hosseinzadeh E, Heydari A. An in-depth DFT insight into the mechanism of NHC-catalyzed generation of p-quinodimethanes: Investigation the role of NHC and different substituents on ε-functionalization. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2021.113350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Ghosh A, Barik S, Shee S, Biju AT. Enantioselective synthesis of tetra-substituted tetralines and tetrahydro-indolizines by NHC-catalyzed azolium-enolate cascade. Chem Commun (Camb) 2021; 57:7794-7797. [PMID: 34268547 DOI: 10.1039/d1cc03165a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
NHC-catalyzed cascade reaction of enals with suitably substituted β-(hetero)aryl enones allowing the enantioselective synthesis of tetra-substituted tetralines and tetrahydro indolizines is presented. The catalytically generated chiral α,β-unsaturated acylazoliums from enals under oxidative conditions reacted in a Michael-Michael-lactonization sequence to form the tricyclic δ-lactone products bearing four contiguous stereocentres.
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Affiliation(s)
- Arghya Ghosh
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India.
| | - Shilpa Barik
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India.
| | - Sayan Shee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India.
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India.
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20
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Akulov AA, Varaksin MV, Charushin VN, Chupakhin ON. C(sp2) – H functionalization of aldimines and related compounds: advances and prospects. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4978] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This is the first systematic review of the most relevant approaches to direct C(sp2)–H bond functionalization of azomethine derivatives. The scope of the applicability of various transformations is analyzed. The review assesses prospects of the application of this functionalization strategy in the multistep synthesis of valuable compounds for use in medicinal chemistry, materials science and related areas.
The bibliography includes 124 references.
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21
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Yang X, Xie Y, Xu J, Ren S, Mondal B, Zhou L, Tian W, Zhang X, Hao L, Jin Z, Chi YR. Carbene‐Catalyzed Activation of Remote Nitrogen Atoms of (Benz)imidazole‐Derived Aldimines for Enantioselective Synthesis of Heterocycles. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016506] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xing Yang
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Yongtao Xie
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
- International Joint Research Center for Molecular Science College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 China
| | - Jun Xu
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Shichao Ren
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Bivas Mondal
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Liejin Zhou
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Weiyi Tian
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Xinglong Zhang
- Institute of High Performance Computing A*STAR (Agency for Science, Technology and Research) Singapore 138632 Singapore
| | - Lin Hao
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Huaxi District Guiyang 550025 China
| | - Yonggui Robin Chi
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Huaxi District Guiyang 550025 China
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22
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Wang G, Zhang Q, Wei C, Zhang Y, Zhang L, Huang J, Wei D, Fu Z, Huang W. Asymmetric Carbene‐Catalyzed Oxidation of Functionalized Aldimines as 1,4‐Dipoles. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202017017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Guanjie Wang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Qiao‐Chu Zhang
- College of Chemistry Zhengzhou University 100 Science Avenue Zhengzhou Henan Province 450001 China
| | - Chenlong Wei
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Ye Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Linxue Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Juhui Huang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Donghui Wei
- College of Chemistry Zhengzhou University 100 Science Avenue Zhengzhou Henan Province 450001 China
| | - Zhenqian Fu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Wei Huang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
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23
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Wang G, Zhang Q, Wei C, Zhang Y, Zhang L, Huang J, Wei D, Fu Z, Huang W. Asymmetric Carbene‐Catalyzed Oxidation of Functionalized Aldimines as 1,4‐Dipoles. Angew Chem Int Ed Engl 2021; 60:7913-7919. [DOI: 10.1002/anie.202017017] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Guanjie Wang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Qiao‐Chu Zhang
- College of Chemistry Zhengzhou University 100 Science Avenue Zhengzhou Henan Province 450001 China
| | - Chenlong Wei
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Ye Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Linxue Zhang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Juhui Huang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Donghui Wei
- College of Chemistry Zhengzhou University 100 Science Avenue Zhengzhou Henan Province 450001 China
| | - Zhenqian Fu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
| | - Wei Huang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
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24
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Yang X, Xie Y, Xu J, Ren S, Mondal B, Zhou L, Tian W, Zhang X, Hao L, Jin Z, Chi YR. Carbene‐Catalyzed Activation of Remote Nitrogen Atoms of (Benz)imidazole‐Derived Aldimines for Enantioselective Synthesis of Heterocycles. Angew Chem Int Ed Engl 2021; 60:7906-7912. [DOI: 10.1002/anie.202016506] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Indexed: 12/22/2022]
Affiliation(s)
- Xing Yang
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Yongtao Xie
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
- International Joint Research Center for Molecular Science College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 China
| | - Jun Xu
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Shichao Ren
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Bivas Mondal
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Liejin Zhou
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Weiyi Tian
- Guizhou University of Traditional Chinese Medicine Guiyang 550025 China
| | - Xinglong Zhang
- Institute of High Performance Computing A*STAR (Agency for Science, Technology and Research) Singapore 138632 Singapore
| | - Lin Hao
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Zhichao Jin
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Huaxi District Guiyang 550025 China
| | - Yonggui Robin Chi
- Division of Chemistry & Mathematical Science School of Physical & Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Guizhou University Huaxi District Guiyang 550025 China
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25
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Mou ZD, Zhang X, Niu D. Catalytic asymmetric umpolung reaction of imines to synthesize isoindolinones and tetrahydroisoquinolines. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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26
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Massey RS, Murray J, Collett CJ, Zhu J, Smith AD, O'Donoghue AC. Kinetic and structure-activity studies of the triazolium ion-catalysed benzoin condensation. Org Biomol Chem 2021; 19:387-393. [PMID: 33351015 DOI: 10.1039/d0ob02207a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Steady-state kinetic and structure-activity studies of a series of six triazolium-ion pre-catalysts 2a-2f were investigated for the benzoin condensation. These data provide quantitative insight into the role of triazolium N-aryl substitution under synthetically relevant catalytic conditions in a polar solvent environment. Kinetic behaviour was significantly different to that previously reported for a related thiazolium-ion pre-catalyst 1, with the observed levelling of initial rate constants to νmax at high aldehyde concentrations for all triazolium catalysts. Values for νmax for 2a-2f increase with electron withdrawing N-aryl substituents, in agreement with reported optimal synthetic outcomes under catalytic conditions, and vary by 75-fold across the series. The levelling of rate constants supports a change in rate-limiting step and evidence supports the assignment of the Breslow-intermediate forming step to the plateau region. Correlation of νmax reaction data yielded a positive Hammett ρ-value (ρ = +1.66) supporting the build up of electron density adjacent to the triazolium N-Ar in the rate-limiting step favoured by electron withdrawing N-aryl substituents. At lower concentrations of aldehyde, both Breslow-intermediate and benzoin formation are partially rate-limiting.
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Affiliation(s)
- Richard S Massey
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, UK.
| | - Jacob Murray
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, UK.
| | - Christopher J Collett
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St Andrews KY16 9SY, UK
| | - Jiayun Zhu
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, UK.
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St. Andrews, North Haugh, St Andrews KY16 9SY, UK
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27
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Yoshida Y, Kukita M, Omori K, Mino T, Sakamoto M. Iminophosphorane-mediated regioselective umpolung alkylation reaction of α-iminoesters. Org Biomol Chem 2021; 19:4551-4564. [DOI: 10.1039/d1ob00596k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first regioselective umpolung alkylation of α-iminoesters with alkyl halides mediated by iminophosphorane has developed (up to 82% yield).
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Affiliation(s)
- Yasushi Yoshida
- Molecular Chirality Research Center
- Graduate School of Engineering
- Chiba University
- Chiba 263-8522
- Japan
| | - Mayu Kukita
- Molecular Chirality Research Center
- Graduate School of Engineering
- Chiba University
- Chiba 263-8522
- Japan
| | - Kazuki Omori
- Molecular Chirality Research Center
- Graduate School of Engineering
- Chiba University
- Chiba 263-8522
- Japan
| | - Takashi Mino
- Molecular Chirality Research Center
- Graduate School of Engineering
- Chiba University
- Chiba 263-8522
- Japan
| | - Masami Sakamoto
- Molecular Chirality Research Center
- Graduate School of Engineering
- Chiba University
- Chiba 263-8522
- Japan
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29
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Dzieszkowski K, Barańska I, Mroczyńska K, Słotwiński M, Rafiński Z. Organocatalytic Name Reactions Enabled by NHCs. MATERIALS 2020; 13:ma13163574. [PMID: 32823580 PMCID: PMC7475904 DOI: 10.3390/ma13163574] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/07/2020] [Accepted: 08/09/2020] [Indexed: 12/20/2022]
Abstract
Giving reactions the names of their discoverers is an extraordinary tradition of organic chemistry. Nowadays, this phenomenon is much rarer, although already named historical reactions are still often developed. This is also true in the case of a broad branch of N-heterocyclic carbenes catalysis. NHCs allow many unique synthetic paths, including commonly known name reactions. This article aims to gather this extensive knowledge and compare historical reactions with current developed processes. Furthermore, this review is a great opportunity to highlight some of the unique applications of these procedures in the total synthesis of biologically active compounds. Hence, this concise article may also be a source of knowledge for scientists just starting their adventure with N-heterocyclic carbene chemistry.
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30
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Das TK, Biju AT. Imines as acceptors and donors in N-heterocyclic carbene (NHC) organocatalysis. Chem Commun (Camb) 2020; 56:8537-8552. [PMID: 32602493 DOI: 10.1039/d0cc03290e] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The synthetic potential of imines as electrophiles or as a source of nucleophilic coupling partner in N-heterocyclic carbene (NHC) catalysis for the synthesis of various nitrogen heterocycles and functionalized amines is highlighted in this Feature Article. Electrophilic imines are suitable candidates for intercepting the NHC-derived acyl anions, homoenolate equivalents, and (di)enolates for the synthesis of α-amino ketones and a variety of lactam derivatives. Moreover, enamines generated from imines bearing α-hydrogen could be trapped with α,β-unsaturated acylazoliums for the synthesis of functionalized dihydropyridinones. NHCs are also useful for the umpolung of imines for the generation of aza-Breslow intermediates thus leading to the synthesis of indoles, quinolines, dihydroquinoxalines etc. A concise account of the diverse reactivity of imines in NHC catalysis has been presented.
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Affiliation(s)
- Tamal Kanti Das
- Organic Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr Homi Bhabha Road, Pune-411008, India and Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India.
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31
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Wang W, Xiong Q, Gong L, Wang Y, Liu J, Lan Y, Zhang X. Regio- and Enantioselective Palladium-Catalyzed Asymmetric Allylation of N-Fluorenyl Trifluoromethyl Imine. Org Lett 2020; 22:5479-5485. [PMID: 32602723 DOI: 10.1021/acs.orglett.0c01836] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A palladium-catalyzed asymmetric allylation of N-fluorenyl trifluoromethyl imine with allylic acetates is disclosed. This method provides scalable and efficient access to polysubstituted chiral α-trifluoromethyl amines bearing two adjacent stereocenters and one allyl group in high yields with excellent regio-, diastereo-, and enantioselectivity. Importantly, this method also provides a powerful strategy for the synthesis of both regioisomeric products and the regioselectivity is controlled by the chiral catalysts and optically active substrates.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, P.R. China.,Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province/College of Chemistry & Chemical Engineering, China West Normal University, Nanchong 637009, P.R. China
| | - Qin Xiong
- College of Chemistry, and Institute of Green Catalysis, Zhengzhou University, Zhengzhou 450001, P.R. China.,School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, P.R. China
| | - Liang Gong
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, P.R. China
| | - Yingwei Wang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, P.R. China
| | - Jie Liu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, P.R. China
| | - Yu Lan
- College of Chemistry, and Institute of Green Catalysis, Zhengzhou University, Zhengzhou 450001, P.R. China.,School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, P.R. China
| | - Xia Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, P.R. China
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Shee S, Mukherjee S, Gonnade RG, Biju AT. Enantioselective Synthesis of Tricyclic β-Lactones by NHC-Catalyzed Desymmetrization of Cyclic 1,3-Diketones. Org Lett 2020; 22:5407-5411. [DOI: 10.1021/acs.orglett.0c01756] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Sayan Shee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Subrata Mukherjee
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Rajesh G. Gonnade
- Centre for Materials Characterization, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411008, India
| | - Akkattu T. Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
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Zhu WR, Liu K, Weng J, Huang WH, Huang WJ, Chen Q, Lin N, Lu G. Catalytic Asymmetric Synthesis of Vicinal Tetrasubstituted Diamines via Umpolung Cross-Mannich Reaction of Cyclic Ketimines. Org Lett 2020; 22:5014-5019. [DOI: 10.1021/acs.orglett.0c01578] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Wen-Run Zhu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Kai Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Jiang Weng
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Wei-Hua Huang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Wei-Jie Huang
- College of Pharmacy, Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Qing Chen
- College of Pharmacy, Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Ning Lin
- College of Pharmacy, Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Gui Lu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
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Das TK, Madica K, Krishnan J, Marelli UK, Biju AT. N-Heterocyclic Carbene Catalysis Exploiting Oxidative Imine Umpolung for the Generation of Imidoyl Azoliums. J Org Chem 2020; 85:5114-5121. [DOI: 10.1021/acs.joc.0c00360] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Tamal Kanti Das
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
| | - Krishnaprasad Madica
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Jagadeesh Krishnan
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Udaya Kiran Marelli
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
| | - Akkattu T. Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
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35
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David William Lupton. Angew Chem Int Ed Engl 2020; 59:4212. [DOI: 10.1002/anie.201912559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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36
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David William Lupton. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201912559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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37
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Barik S, Biju AT. N-Heterocyclic carbene (NHC) organocatalysis using aliphatic aldehydes. Chem Commun (Camb) 2020; 56:15484-15495. [DOI: 10.1039/d0cc06867e] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Recent advances are presented in NHC catalysis employing aliphatic aldehydes as substrates for the generation of various carbene-bound intermediates and subsequent interception with electrophiles/nucleophiles.
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Affiliation(s)
- Shilpa Barik
- Department of Organic Chemistry
- Indian Institute of Science
- Bangalore 560012
- India
| | - Akkattu T. Biju
- Department of Organic Chemistry
- Indian Institute of Science
- Bangalore 560012
- India
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38
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Satyam K, Harish B, Nanubolu JB, Suresh S. N-Heterocyclic carbene (NHC)-catalyzed tandem imine umpolung–aza-Michael addition–oxidation of β-carboline cyclic imines. Chem Commun (Camb) 2020; 56:2803-2806. [DOI: 10.1039/d0cc00321b] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N-Heterocyclic carbene (NHC)-catalyzed tandem imine umpolung–aza-Michael addition–oxidation of cyclic imines for the synthesis of a wide range of biologically relevant β-carboline-1-one derivatives has been disclosed.
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Affiliation(s)
- Killari Satyam
- Department of Organic Synthesis and Process Chemistry
- CSIR-Indian Institute of Chemical Technology (CSIR-IICT)
- Hyderabad 500 007
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Battu Harish
- Department of Organic Synthesis and Process Chemistry
- CSIR-Indian Institute of Chemical Technology (CSIR-IICT)
- Hyderabad 500 007
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Jagadeesh Babu Nanubolu
- Laboratory of X-Ray Crystallography
- Department of Analytical Chemistry
- CSIR-Indian Institute of Chemical Technology (CSIR-IICT)
- Hyderabad 500 007
- India
| | - Surisetti Suresh
- Department of Organic Synthesis and Process Chemistry
- CSIR-Indian Institute of Chemical Technology (CSIR-IICT)
- Hyderabad 500 007
- India
- Academy of Scientific and Innovative Research (AcSIR)
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39
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Feng Y, Park J, Li SG, Boutin R, Viereck P, Schilling MA, Berghuis AM, Tsantrizos YS. Chirality-Driven Mode of Binding of α-Aminophosphonic Acid-Based Allosteric Inhibitors of the Human Farnesyl Pyrophosphate Synthase (hFPPS). J Med Chem 2019; 62:9691-9702. [PMID: 31577901 DOI: 10.1021/acs.jmedchem.9b01104] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Thienopyrimidine-based allosteric inhibitors of the human farnesyl pyrophosphate synthase (hFPPS), characterized by a chiral α-aminophosphonic acid moiety, were synthesized as enantiomerically enriched pairs, and their binding mode was investigated by X-ray crystallography. A general consensus in the binding orientation of all (R)- and (S)-enantiomers was revealed. This finding is a prerequisite for establishing a reliable structure-activity relationship (SAR) model.
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Affiliation(s)
- Yuting Feng
- Department of Chemistry , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada
| | - Jaeok Park
- Department of Chemistry , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada.,Department of Biochemistry , McGill University , 3649 Promenade Sir William Osler , Montreal , Quebeck H3G 0B1 , Canada
| | - Shi-Guang Li
- Department of Chemistry , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada
| | - Rebecca Boutin
- Department of Chemistry , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada
| | - Peter Viereck
- Department of Chemistry , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada
| | - Matthew A Schilling
- Department of Biochemistry , McGill University , 3649 Promenade Sir William Osler , Montreal , Quebeck H3G 0B1 , Canada
| | - Albert M Berghuis
- Department of Biochemistry , McGill University , 3649 Promenade Sir William Osler , Montreal , Quebeck H3G 0B1 , Canada
| | - Youla S Tsantrizos
- Department of Chemistry , McGill University , 801 Sherbrooke Street West , Montreal , Quebec H3A 0B8 , Canada.,Department of Biochemistry , McGill University , 3649 Promenade Sir William Osler , Montreal , Quebeck H3G 0B1 , Canada
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40
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Hutchinson SM, Ardón-Muñoz LG, Ratliff ML, Bolliger JL. Catalytic Preparation of 1-Aryl-Substituted 1,2,4-Triazolium Salts. ACS OMEGA 2019; 4:17923-17933. [PMID: 31681902 PMCID: PMC6822220 DOI: 10.1021/acsomega.9b03109] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Accepted: 10/09/2019] [Indexed: 05/10/2023]
Abstract
1,4-Diaryl- and 1-aryl-4-alkyl-substituted 1,2,4-triazolium salts are convenient air-stable precursors to carbenes used both as organocatalysts or as ligands for transition metal complexes. Traditionally, they are prepared via a multistep synthetic pathway with the low-yielding formation of the triazolium ring occurring in the last step. We have developed an alternative two-step synthesis involving the conversion of a primary amine or aniline derivative to the corresponding 4-substituted triazole followed by a copper-catalyzed arylation with diaryliodonium salts. This transition metal-catalyzed arylation can be carried out under mild conditions in acetonitrile and is tolerant toward both water and oxygen. Additionally, the high functional group tolerance of the protocol described here gives easy access to triazolium salts containing heterocyclic substituents or sulfides.
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41
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Motaleb A, Rani S, Das T, Gonnade RG, Maity P. Phosphite‐Catalyzed C−H Allylation of Azaarenes via an Enantioselective [2,3]‐Aza‐Wittig Rearrangement. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Abdul Motaleb
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune- 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad- 201002 India
| | - Soniya Rani
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune- 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad- 201002 India
| | - Tamal Das
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune- 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad- 201002 India
| | - Rajesh G. Gonnade
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune- 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad- 201002 India
| | - Pradip Maity
- Organic Chemistry Division CSIR-National Chemical Laboratory Dr. Homi Bhabha Road Pune- 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad- 201002 India
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42
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Priebbenow DL. Insights into the Stability of Siloxy Carbene Intermediates and Their Corresponding Oxocarbenium Ions. J Org Chem 2019; 84:11813-11822. [PMID: 31424932 DOI: 10.1021/acs.joc.9b01698] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Siloxy carbenes, formed thermally or photochemically from acyl silanes via a 1,2-Brook rearrangement, are intriguing reactive intermediates that partake in a range of chemical reactions. To gain further insight into the properties of this class of carbenes, the thermodynamic stabilities of a series of known siloxy carbenes were explored on the basis of hydrogenation enthalpies. Calculations were conducted at the B3LYP-D3(BJ) level (using dispersion-corrected DFT) on siloxy carbenes (X-C-OSiR3, singlet and triplet state), oxocarbenium ions (X-CH-OSiR3+), and their hydrogen addition products (X-CH2-OSiR3). Overall, strong correlation between singlet-triplet gaps and hydrogenation enthalpies was observed. Carbene stabilization enthalpy (CSE) values were also determined to provide additional insight into the structural features that influence the stability of siloxy carbenes.
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Affiliation(s)
- Daniel L Priebbenow
- School of Life and Environmental Sciences , Deakin University , Waurn Ponds , Australia , 3216
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43
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Motaleb A, Rani S, Das T, Gonnade RG, Maity P. Phosphite-Catalyzed C-H Allylation of Azaarenes via an Enantioselective [2,3]-Aza-Wittig Rearrangement. Angew Chem Int Ed Engl 2019; 58:14104-14109. [PMID: 31389132 DOI: 10.1002/anie.201906681] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/19/2019] [Indexed: 11/11/2022]
Abstract
A phosphite-mediated [2,3]-aza-Wittig rearrangement has been developed for the regio- and enantioselective allylic alkylation of six-membered heteroaromatic compounds (azaarenes). The nucleophilic phosphite adducts of N-allyl salts undergo a stereoselective base-mediated aza-Wittig rearrangement and dissociation of the chiral phosphite for overall C-H functionalization of azaarenes. This method provides efficient access to tertiary and quaternary chiral centers in isoquinoline, quinoline, and pyridine systems, tolerating a broad variety of substituents on both the allyl part and azaarenes. Catalysis with chiral phosphites is also demonstrated with synthetically useful yields and enantioselectivities.
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Affiliation(s)
- Abdul Motaleb
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
| | - Soniya Rani
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
| | - Tamal Das
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
| | - Rajesh G Gonnade
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
| | - Pradip Maity
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-, 411008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
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44
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Yoshida Y, Omori K, Hiroshige T, Mino T, Sakamoto M. Chemoselective Catalytic Asymmetric Synthesis of Functionalized Aminals Through the Umpolung Organocascade Reaction of α‐Imino Amides. Chem Asian J 2019; 14:2737-2743. [DOI: 10.1002/asia.201900764] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Yasushi Yoshida
- Molecular Chirality Research CenterGraduate School of Science and EngineeringChiba University 1–33, Yayoi-cho Inage-ku, Chiba-shi Chiba 263-8522 Japan
| | - Kazuki Omori
- Molecular Chirality Research CenterGraduate School of Science and EngineeringChiba University 1–33, Yayoi-cho Inage-ku, Chiba-shi Chiba 263-8522 Japan
| | - Tomohiko Hiroshige
- Molecular Chirality Research CenterGraduate School of Science and EngineeringChiba University 1–33, Yayoi-cho Inage-ku, Chiba-shi Chiba 263-8522 Japan
| | - Takashi Mino
- Molecular Chirality Research CenterGraduate School of Science and EngineeringChiba University 1–33, Yayoi-cho Inage-ku, Chiba-shi Chiba 263-8522 Japan
| | - Masami Sakamoto
- Molecular Chirality Research CenterGraduate School of Science and EngineeringChiba University 1–33, Yayoi-cho Inage-ku, Chiba-shi Chiba 263-8522 Japan
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45
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Li Z, Zhang L, Nishiura M, Hou Z. Copper-Catalyzed Umpolung of Imines through Carbon-to-Nitrogen Boryl Migration. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00777] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Zhenghua Li
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Liang Zhang
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Masayoshi Nishiura
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Zhaomin Hou
- Advanced Catalysis Research Group, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Organometallic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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46
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Das TK, Ghosh A, Balanna K, Behera P, Gonnade RG, Marelli UK, Das AK, Biju AT. N-Heterocyclic Carbene-Catalyzed Umpolung of Imines for the Enantioselective Synthesis of Dihydroquinoxalines. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00737] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Tamal Kanti Das
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
| | - Avik Ghosh
- School of Mathematical and Computational Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Kuruva Balanna
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Pradipta Behera
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Rajesh G. Gonnade
- Centre for Materials Characterization, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Udaya Kiran Marelli
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110020, India
| | - Abhijit Kumar Das
- School of Mathematical and Computational Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Akkattu T. Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
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47
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Chauhan P. N-Heterocyclic carbene catalysed umpolung reactions of imines approaching enantioselective synthesis. Org Chem Front 2019. [DOI: 10.1039/c9qo01074b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
N-Heterocyclic Carbene (NHC)-catalyzed umpolung reactions of aldimines are highlighted in this article, with a special emphasis on the corresponding enantioselective transformations developed by the research groups of Lupton and Biju.
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Affiliation(s)
- Pankaj Chauhan
- Department of Chemistry
- Indian Institute of Technology Jammu
- Jammu (J&K)
- India
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