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Xie ZY, Tang C, Li L, Zhou Z, Zou J, Qian PC. Rhodium-Catalyzed Regioselective [4 + 2] Cycloaddition of Ynamines and 2-(Cyanomethyl)phenylboronates. Org Lett 2024; 26:6586-6590. [PMID: 39079756 DOI: 10.1021/acs.orglett.4c02120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2024]
Abstract
A rhodium-catalyzed [4 + 2] cycloaddition of ynamines and 2-(cyanomethyl)phenylboronates has been developed, leading to efficient and excellent regioselective synthesis of valuable indole-linked aromatic compounds in a concise and flexible approach. Interestingly, this strategy was successful in the construction of C···N axially chiral indoles with high enantiocontrol by the introduction of a new phosphoramidite ligand (Xie-Phos).
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Affiliation(s)
- Zhong-Yang Xie
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Conghui Tang
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Long Li
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Zijun Zhou
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Jun Zou
- School of Science, Shanghai Institute of Technology, Shanghai, 201418, China
| | - Peng-Cheng Qian
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
- College of Medicine & Pharmaceutical Enginering, Taizhou Vocational & Technical College, Taizhou 318000, China
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Yang J, Xie ZY, Ye YJ, Ye SB, Wang YB, Wang WT, Qian PC, Song RJ, Sun Q, Ye LW, Li L. Ir/Zn-cocatalyzed chemo- and atroposelective [2+2+2] cycloaddition for construction of C─N axially chiral indoles and pyrroles. SCIENCE ADVANCES 2023; 9:eadk1704. [PMID: 38117883 PMCID: PMC10732529 DOI: 10.1126/sciadv.adk1704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 11/20/2023] [Indexed: 12/22/2023]
Abstract
Here, an Ir/Zn-cocatalyzed atroposelective [2+2+2] cycloaddition of 1,6-diynes and ynamines was developed, forging various functionalized C─N axially chiral indoles and pyrroles in generally good to excellent yields (up to 99%), excellent chemoselectivities, and high enantioselectivities (up to 98% enantiomeric excess) with wide substrate scope. This cocatalyzed strategy not only provided an alternative promising and reliable way for asymmetric alkyne [2+2+2] cyclotrimerization in an easy handle but also settled the issues of previous [Rh(COD)2]BF4-catalyzed system on the construction of C─N axial chirality such as complex operations, limited substrate scope, and low efficiency. In addition, control experiments and theoretical calculations disclosed that Zn(OTf)2 markedly reduced the barrier of migration insertion to significantly increase reaction efficiency, which was distinctly different from previous work on the Lewis acid for improving reaction yield through accelerating oxidative addition and reductive elimination.
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Affiliation(s)
- Jian Yang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Zhong-Yang Xie
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Yu-Jie Ye
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Sheng-Bing Ye
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Yi-Bo Wang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Wen-Tao Wang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Peng-Cheng Qian
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
- Wenzhou Key Laboratory of Technology and Application of Environmental Functional Materials, Institute of New Materials and Industry Technology, Wenzhou University, Wenzhou 325000, China
| | - Ren-Jie Song
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Qing Sun
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Long-Wu Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Long Li
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
- Wenzhou Key Laboratory of Technology and Application of Environmental Functional Materials, Institute of New Materials and Industry Technology, Wenzhou University, Wenzhou 325000, China
- State Key Laboratory of Physical Chemistry of Solid Surfaces and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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Yang L, Hou A, Jiang Q, Cheng M, Liu Y. Methodological Development and Applications of Tryptamine-Ynamide Cyclizations in Synthesizing Core Skeletons of Indole Alkaloids. J Org Chem 2023; 88:11377-11391. [PMID: 37540141 DOI: 10.1021/acs.joc.3c01088] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Over the past two decades, synthetic strategies for synthesizing the skeletons of various indole alkaloids based on tryptamine-ynamide have been continuously developed and applied to the total syntheses or formal total syntheses of related molecules. In this synopsis, we summarized the cyclization pathways of tryptamine-ynamide under different catalytic conditions, emphasizing the reaction mechanism and applications in the syntheses of indole alkaloids.
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Affiliation(s)
- Lu Yang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Anbin Hou
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Qing Jiang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Maosheng Cheng
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Yongxiang Liu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
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Mishra AK, Chauhan A, Kumar S, Kant R, Kumar R. Catalyst-Controlled Diastereoselective Synthesis of Bridged [3.3.1] Bis(Indolyl)-Oxanes and Oxepanes via Desymmetrization of Bis(Indolyl)-Cyclohexadienones. Org Lett 2023; 25:3034-3039. [PMID: 37092788 DOI: 10.1021/acs.orglett.3c00834] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
A catalyst-controlled divergent synthesis of bridged [3.3.1] bis(indolyl)-oxanes and cis-[6.7] fused bis(indolyl) oxepanes via diastereoselective desymmetrization of bis(indolyl)-cyclohexadienones is presented for the first time. The reaction is highly atom- and step-economic, furnishing sp3-rich functionalized bis(indolyl) derivatives in good to excellent yields with wide substrate scope. The reaction proceeds through Friedel-Crafts alkylation followed by catalyst-controlled selective C-C bond formation/rearrangement. Gram scale synthesis and synthetic utility to generate bis(indolyl) alkaloid-like molecular diversity were also illustrated.
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Affiliation(s)
- Abhishek Kumar Mishra
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow 226031, Uttar Pradesh India
| | - Anil Chauhan
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow 226031, Uttar Pradesh India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Santosh Kumar
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow 226031, Uttar Pradesh India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Ruchir Kant
- Molecular and Structural Biology Division, CSIR-Central Drug Research Institute, Lucknow 226031, Uttar Pradesh, India
| | - Ravindra Kumar
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow 226031, Uttar Pradesh India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
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Chen Y, Yan YH, Zhu BH, Chen F, Li L, Qian PC. Copper-Catalyzed Tandem Cyclization/Direct C(sp 2)-H Annulation of Azide-Ynamides via α-Imino Copper Carbenes: Access to Azepino[2,3- b:4,5- b']diindoles. Org Lett 2023; 25:2063-2067. [PMID: 36939559 DOI: 10.1021/acs.orglett.3c00434] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
A novel copper-catalyzed tandem cyclization/direct C(sp2)-H annulation of phenyl azide-ynamides via α-imino copper carbenes has been developed, which provides a concise and flexible approach for the construction of a range of valuable azepino[2,3-b:4,5-b']diindoles in mostly good to excellent yields with high chemoselectivities. This tandem reaction also exhibits a broad substrate scope, excellent functional group tolerance, simple operation, and mild reaction conditions.
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Affiliation(s)
- Yi Chen
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Yao-Hong Yan
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Bo-Han Zhu
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Fan Chen
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Long Li
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Peng-Cheng Qian
- College of Chemistry & Materials Engineering, Wenzhou University, Wenzhou 325035, China.,Wenzhou Key Laboratory of Technology and Application of Environmental Functional Materials, Institute of New Materials & Industry Technology, Wenzhou University, Wenzhou 325000, China
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