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Bhattacharjee P, Sarma B, Bora U. Molecular-iodine catalyzed selective construction of cyclopenta[ b]indoles from indoles and acetone: a green gateway to indole-fused cycles. Org Biomol Chem 2023; 21:9275-9285. [PMID: 37974448 DOI: 10.1039/d3ob01561k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Molecular-iodine catalyzed access to an important class of bio-relevant indole derivatives, cyclopenta[b]indoles, has been achieved via a cascade addition/intramolecular cyclization reaction of indoles and acetone. Explorations of diverse substitution patterns revealed an essential substrate-control in the reaction. The high-density electronic core of indole is pivotal in favouring the formation of indolyl-cyclopenta[b]indole derivatives; in contrast, the electron deficiency of the core hindered the cyclization process, directing the formation of bis(indolyl)propanes. Investigations on the mechanistic pathway revealed that bis(indolyl)alkanes were the intermediates for the addition-cyclization process. This simple experimental method provides sustainable synthetic access to cyclopentannulated indoles.
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Affiliation(s)
- Prantika Bhattacharjee
- Department of Chemical Sciences, Tezpur University, Napaam-784028, Assam, India
- Department of Chemistry, Bahona College, Jorhat-785101, Assam, India.
| | - Bipul Sarma
- Department of Chemical Sciences, Tezpur University, Napaam-784028, Assam, India
| | - Utpal Bora
- Department of Chemical Sciences, Tezpur University, Napaam-784028, Assam, India
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2
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Li NS, Piccirilli JA, Greene GL. Reinvestigating the Synthesis and Characterization of Ethyl 3-[5-(2-Ethoxycarbonyl-1-methylvinyloxy)-1-methyl-1 H-indol-3-yl]-but-2-enoate. ACS OMEGA 2023; 8:31941-31945. [PMID: 37692243 PMCID: PMC10483681 DOI: 10.1021/acsomega.3c03686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 07/10/2023] [Indexed: 09/12/2023]
Abstract
We reinvestigated the reported method for the synthesis of ethyl 3-[5-(2-ethoxycarbonyl-1-methylvinyloxy)-1-methyl-1H-indol-3-yl]-but-2-enoate (MIBE), which was obtained by the reaction of 5-hydroxy-1-methyl-1H-indole with excess ethyl acetoacetate catalyzed by indium(III) chloride. Based on the NMR and MS data, we assigned the structure of the isolated product as (3E)-3-(2-ethoxy-2-oxoethylidene)-1,2,3,4-tetrahydro-7-hydroxy-1,4-dimethylcyclopent[b]indole-1-acetate (2a) rather than the reported MIBE.
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Affiliation(s)
- Nan-Sheng Li
- Ben
May Department for Cancer Research, The
University of Chicago, 929 East 57th Street, Chicago Illinois 60637, United States
- Department
of Biochemistry & Molecular Biology, The University of Chicago, 929 East 57th Street, Chicago Illinois 60637, United States
| | - Joseph A. Piccirilli
- Department
of Biochemistry & Molecular Biology, The University of Chicago, 929 East 57th Street, Chicago Illinois 60637, United States
- Department
of Chemistry, The University of Chicago, 929 East 57th Street, Chicago Illinois 60637, United States
| | - Geoffrey L. Greene
- Ben
May Department for Cancer Research, The
University of Chicago, 929 East 57th Street, Chicago Illinois 60637, United States
- Department
of Biochemistry & Molecular Biology, The University of Chicago, 929 East 57th Street, Chicago Illinois 60637, United States
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3
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Jiang Q, Yang T, Li Q, Liang GM, Liu Y, He CY, Chu WD, Liu QZ. Synthesis of Cyclopenta[ b]indoles via Sc(III)-Catalyzed Annulation of Vinyl Diazoacetates with Indole-Derived Unsaturated Imines. Org Lett 2023; 25:3184-3189. [PMID: 37125696 DOI: 10.1021/acs.orglett.3c00192] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
A Lewis acid Sc(OTf)3-catalyzed annulation reaction of vinyl diazoacetates with in situ formed α,β-unsaturated imines for the preparation of indole-fused tricyclic rings has been reported. This strategy involves a sequential addition/rebound addition process of vinyl diazoacetates and an in situ dedinitrogenation. This annulation protocol features low-cost catalysts, mild reaction conditions, and facilely prepared substrates.
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Affiliation(s)
- Qin Jiang
- 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 Yang
- 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 Li
- 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
| | - Guang-Ming Liang
- 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
| | - Yong 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
| | - 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
| | - Wen-Dao Chu
- 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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4
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Matsuyama H, Zhang X, Terada M, Jin T. Construction of Alkylidene Fluorene Scaffolds Using Pd-Catalyzed Direct Arene/Alkene Coupling Strategy. Org Lett 2023; 25:800-804. [PMID: 36700879 DOI: 10.1021/acs.orglett.2c04307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A versatile synthetic method for the construction of alkylidene fluorenes and their heteroarene derivatives has been developed successfully by means of a Pd(II)-catalyzed direct C-H/C-H coupling of o-alkenyl biaryls. Use of the Pd(OAc)2 catalyst under aerobic oxidation conditions gives rise to the corresponding alkylidene fluorenes having various functional groups and diversely fused polycyclic systems. The resulting products can serve as versatile synthetic building blocks for the construction of structurally diverse polycyclic arenes and heteroarenes.
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Affiliation(s)
- Hidenori Matsuyama
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan
| | - Xuan Zhang
- Nanjing University of Information Science & Technology, Nanjing, 210044, China
| | - Masahiro Terada
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan
| | - Tienan Jin
- Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan
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5
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Abstract
In this contribution, we provide a comprehensive overview of acyclic twisted amides, covering the literature since 1993 (the year of the first recognized report on acyclic twisted amides) through June 2020. The review focuses on classes of acyclic twisted amides and their key structural properties, such as amide bond twist and nitrogen pyramidalization, which are primarily responsible for disrupting nN to π*C═O conjugation. Through discussing acyclic twisted amides in comparison with the classic bridged lactams and conformationally restricted cyclic fused amides, the reader is provided with an overview of amidic distortion that results in novel conformational features of acyclic amides that can be exploited in various fields of chemistry ranging from organic synthesis and polymers to biochemistry and structural chemistry and the current position of acyclic twisted amides in modern chemistry.
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Affiliation(s)
- Guangrong Meng
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Jin Zhang
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States.,College of Chemistry and Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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Xiong J, Zhao X, Feng X, Xianxing J. Decarboxylative Propargylation/Hydroamination/Aromatization Enabled by Copper/ Amine Cooperative Catalysis: Construction of Cyclopenta[b]indole Derivatives. CURR ORG CHEM 2020. [DOI: 10.2174/1385272824999200701115141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An efficient decarboxylative cycloaddition of 2,3-dioxopyrrolidines and ethynyl
benzoxazinanones has been established by cooperative copper/amine catalysis. A copper–
allenylidene complex and enolate intermediate, each catalytically generated from distinct
substrates, underwent a cascade propargylation/hydroamination/aromatization process to
construct a big library of cyclopenta[b]indole derivatives with good to excellent yields and
excellent diastereoselectivity.
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Affiliation(s)
- Jiale Xiong
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Xiaoyun Zhao
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Xing Feng
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
| | - Jiang Xianxing
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, China
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7
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Duan S, Zhang W, Hu Y, Xu Z, Li C. Synthesis of Cyclopenta[
b
]indoles via a Formal [3+2] Cyclization of
N
‐Sulfonyl‐1,2,3‐triazoles and Indoles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000624] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Shengguo Duan
- Department of ChemistryZhejiang Sci-Tech University Xiasha West Higher Education District Hangzhou 310018 People's Republic of China
| | - Wan Zhang
- Department of ChemistryZhejiang Sci-Tech University Xiasha West Higher Education District Hangzhou 310018 People's Republic of China
| | - Yuntong Hu
- Department of ChemistryZhejiang Sci-Tech University Xiasha West Higher Education District Hangzhou 310018 People's Republic of China
| | - Ze‐Feng Xu
- Department of ChemistryZhejiang Sci-Tech University Xiasha West Higher Education District Hangzhou 310018 People's Republic of China
| | - Chuan‐Ying Li
- Department of ChemistryZhejiang Sci-Tech University Xiasha West Higher Education District Hangzhou 310018 People's Republic of China
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8
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Liu S, Zhao F, Chen X, Deng G, Huang H. Aerobic Oxidative Functionalization of Indoles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000285] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Saiwen Liu
- College of Materials and Chemical Engineering Hunan City University Yiyang 413000 Hunan People's Republic of China
| | - Feng Zhao
- Key Laboratory for Antibody-based Drug and Intelligent Delivery System of Hunan Province Key Laboratory of Dong Medicine of Hunan Province School of Pharmaceutical Sciences Hunan University of Medicine Huaihua 418000 People's Republic of China
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Xing Chen
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Guo‐Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
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Carral-Menoyo A, Sotomayor N, Lete E. Palladium-catalysed Heck-type alkenylation reactions in the synthesis of quinolines. Mechanistic insights and recent applications. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00789g] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Recent developments in Pd(0)- and Pd(ii)-catalysed alkenylation reactions for the synthesis of quinolines focusing on mechanistic understanding.
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Affiliation(s)
- Asier Carral-Menoyo
- Departamento de Química Orgánica II
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU
- 48080 Bilbao
- Spain
| | - Nuria Sotomayor
- Departamento de Química Orgánica II
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU
- 48080 Bilbao
- Spain
| | - Esther Lete
- Departamento de Química Orgánica II
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco/Euskal Herriko Unibertsitatea UPV/EHU
- 48080 Bilbao
- Spain
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