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Hu L, Zhang J, Li M, Feng Y, Lu F. Electrochemical oxidative radical cascade cyclization of dienes and diselenides towards the synthesis of seleno-benzazepines. RSC Adv 2024; 14:12556-12560. [PMID: 38638814 PMCID: PMC11024674 DOI: 10.1039/d4ra01914h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 04/09/2024] [Indexed: 04/20/2024] Open
Abstract
Selenium-containing compounds are important scaffolds owing to their value in medicinal chemistry, biochemistry and material chemistry. Herein, we report an electrochemical approach to access seleno-benzazepines through an oxidative radical cascade cyclization of dienes with diselenides under metal-free, external oxidant-free and base-free conditions. In a simple undivided cell, various dienes and diselenides were suitable for this transformation, generating the desired products in up to 84% yields. This method provides a green and convenient route for the synthesis of valuable selenium-containing seven-membered N-heterocycles from simple starting materials.
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Affiliation(s)
- Ling Hu
- The National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Chinese Medicine 56 Yangming Road Jiangxi Nanchang 330006 P. R. China
| | - Jingyi Zhang
- The National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Chinese Medicine 56 Yangming Road Jiangxi Nanchang 330006 P. R. China
| | - Minghan Li
- The National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Chinese Medicine 56 Yangming Road Jiangxi Nanchang 330006 P. R. China
| | - Yulin Feng
- The National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Chinese Medicine 56 Yangming Road Jiangxi Nanchang 330006 P. R. China
| | - Fangling Lu
- The National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Jiangxi University of Chinese Medicine 56 Yangming Road Jiangxi Nanchang 330006 P. R. China
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Deng YQ, Yan QQ, Zhang TT, Zhou Y, He CY, Liu QZ. Copper-Catalyzed Asymmetric Allylation of N-Aryl Aldimines. J Org Chem 2024; 89:313-320. [PMID: 38079214 DOI: 10.1021/acs.joc.3c02035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
The copper-catalyzed enantioselective allylation reaction of N-aryl aldimines has been developed using a combination of Cu(OAc)2 and SPINOL-based phosphonamidite. This protocol significantly broadens the substrate scope, such that imines bearing various ortho-substituents on the N-aryl were converted smoothly into homoallylic amines in up to 99% yield and 98% ee. Taking advantage of the diversity of the N-aryl motif, three kinds of N-heterocyclic compounds were constructed, respectively, from the corresponding homoallylic amines in merely one step.
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Affiliation(s)
- Yu-Qin Deng
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Qi-Qi Yan
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Ting-Ting Zhang
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Yi Zhou
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Cheng-Yu He
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
| | - Quan-Zhong Liu
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, No. 1, Shida Road, Nanchong 637002, China
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3
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Wang YJ, Zhao LM. Synthesis of 10-Membered Azecines through Pd-Catalyzed Formal [6+4] Cycloaddition and Their Transannular Reaction to Polycyclic Compounds. Chemistry 2023; 29:e202302111. [PMID: 37776147 DOI: 10.1002/chem.202302111] [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: 07/05/2023] [Revised: 09/17/2023] [Accepted: 09/25/2023] [Indexed: 10/01/2023]
Abstract
Azecine fragments are frequently presented in natural products and bioactive compounds. However, minor efforts have been devoted to these 10-membered N-heterocycles, and their synthesis is still challenging. Reported herein is the first catalytic formal [6+4] cycloaddition for the synthesis of 10-membered azecines. Under palladium catalysis, the reaction of δ-vinylvalerolactones and benzofuran-derived azadienes proceeds smoothly to afford benzofuran-fused azecines with high diastereoselectivity in moderate to good yields. A unique transannular reaction of these 10-membered azecines for the construction of polycyclic compounds is also demonstrated.
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Affiliation(s)
- Yu-Jiao Wang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, China
| | - Li-Ming Zhao
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu, China
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Zhao C, Dong A, Ju D, Huang J, Jia R, Liu Y, Zhao J. Pd‐Catalyzed Coupling Cyclization of δ, ϵ‐Alkenyl Oxime toward Access to 1,2‐Oxezapines. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Chuang Zhao
- Faculty of Chemistry and Life Science Changchun University of Technology 2055 Yan'an Street Changchun Jilin 130012 P. R. China
| | - Ah‐Ying Dong
- Faculty of Chemistry and Life Science Changchun University of Technology 2055 Yan'an Street Changchun Jilin 130012 P. R. China
| | - Dongyan Ju
- Faculty of Chemistry and Life Science Changchun University of Technology 2055 Yan'an Street Changchun Jilin 130012 P. R. China
| | - Jianhong Huang
- Faculty of Chemistry and Life Science Changchun University of Technology 2055 Yan'an Street Changchun Jilin 130012 P. R. China
| | - Ran Jia
- Department of theoretical chemistry Jilin University Changchun Jilin 130023 P. R. China
| | - Yu Liu
- Faculty of Chemistry and Life Science Changchun University of Technology 2055 Yan'an Street Changchun Jilin 130012 P. R. China
| | - Jinbo Zhao
- Faculty of Chemistry and Life Science Changchun University of Technology 2055 Yan'an Street Changchun Jilin 130012 P. R. China
- College of Pharmacy Shandong First Medical University & Shandong Academy of Medical Sciences Tai-An Shandong 271016 P. R. China
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Zou J, Xu L, Tang Y, Wang W, Cai Y. Organocatalytic Asymmetric Synthesis of Bridged Tetrahydrobenzo[ b]azepines/oxepines. Org Lett 2022; 24:7140-7144. [PMID: 36169238 DOI: 10.1021/acs.orglett.2c02833] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The asymmetric synthesis of bridged tetrahydrobenzo[b]azepine and oxepine derivatives through chiral Brønsted acid catalyzed asymmetric aza-Piancatelli rearrangement/Michael addition sequence has been developed. The reaction proceeds under mild reaction conditions to afford the final bridged cyclic products in good yields with excellent enantio- and diastereoselectivities.
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Affiliation(s)
- Jiaming Zou
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Lei Xu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Yurong Tang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Wentao Wang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Yunfei Cai
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
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Z. Zard S, Quiclet-Sire B. The Xanthate Route to Benzazepinones and Their Aza Congeners. HETEROCYCLES 2022. [DOI: 10.3987/rev-22-sr(r)9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Liu X, Wang J, Dong G. Modular Entry to Functionalized Tetrahydrobenzo[ b]azepines via the Palladium/Norbornene Cooperative Catalysis Enabled by a C7-Modified Norbornene. J Am Chem Soc 2021; 143:9991-10004. [PMID: 34161077 DOI: 10.1021/jacs.1c04575] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Tetrahydrobenzo[b]azepines (THBAs) are commonly found in many bioactive compounds; however, the modular preparation of functionalized THBAs remains challenging to date. Here, we report a straightforward method to synthesize THBAs directly from simple aryl iodides via palladium/norbornene (Pd/NBE) cooperative catalysis. Capitalizing on an olefin-tethered electrophilic amine reagent, an ortho amination followed by 7-exo-trig Heck cyclization furnishes the seven-membered heterocycle. To overcome the difficulty with ortho-unsubstituted aryl iodide substrates, we discovered a unique C7-bromo-substituted NBE (N1) to offer the desired reactivity and selectivity. In addition to THBAs, synthesis of other benzo-seven-membered ring compounds can also be promoted by N1. Combined experimental and computational studies show that the C7-bromo group in N1 plays an important and versatile role in this catalysis, including promoting β-carbon elimination, suppressing benzocyclobutene formation, and stabilizing reaction intermediates. The mechanistic insights gained could guide future catalyst design. The synthetic utility has been demonstrated in a streamlined synthesis of tolvaptan and forming diverse pharmaceutically relevant THBA derivatives. Finally, a complementary and general catalytic condition to access C6-substituted THBAs from ortho-substituted aryl iodides has also been developed.
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Affiliation(s)
- Xin Liu
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Jianchun Wang
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States.,Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
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