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Zhang Z, Sun H, Zhang M, Song S, Peng M, Dai W, Wang Y, Yu F. Switchable Skeletal Rearrangement of Hexahydro-4 H-indol-4-ones: Divergent Synthesis of Dihydroxy-4 H-cyclopenta[ b]pyridin-4-ones and 8-Alkenyl Oxepane-2,6-diones. Org Lett 2024; 26:4205-4211. [PMID: 38743606 DOI: 10.1021/acs.orglett.4c00908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
An unprecedented base-controlled selective skeletal rearrangement reaction of hexahydro-4H-indol-4-ones has been developed. In this protocol, highly functionalized dihydroxy-4H-cyclopenta[b]pyridin-4-ones and 8-alkenyl oxepane-2,6-diones were prepared with a broad substrate scope and high chemoselectivity in moderate to excellent yields selectively by modulating LiOH and Et3N. In addition, the newly formed 8-alkenyl oxepane-2,6-dione scaffolds could be easily further derivatized to 5-(pyrrol-2-yl)dihydrofuran-2(3H)-ones through a rare intramolecular rearrangement reaction.
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Affiliation(s)
- Zhilai Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Haifeng Sun
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Mingshuai Zhang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Siyu Song
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Menglin Peng
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Weifeng Dai
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
| | - Yongchao Wang
- College of Vocational and Technical Education, Yunnan Normal University, Kunming 650092, People's Republic of China
| | - Fuchao Yu
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, P. R. of China
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2
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Upreti GC, Singh T, Khanna K, Sahoo D, Singh A. Photocatalytic, α-Aminoalkyl Radical-Mediated, Methylene-Extrusive Ring-Closing Transformation of o-Alkynyl and o-Cyano Acrylamides. Org Lett 2024; 26:3652-3656. [PMID: 38656756 DOI: 10.1021/acs.orglett.4c01165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Herein we report a visible-light-induced, α-aminoalkyl radical-mediated cascade reaction of 1,7-enynes that establishes a unique ring-closing enyne transformation pathway which occurs with concomitant loss of a methylene moiety. The α-aminoalkyl radical derived from N,N-dimethylaniline was demonstrated to be a traceless promoter of enyne reorganization leading to 4-alkylquinolinones. The reaction can also be extended to nitrile-substituted acrylamide systems, leading to carbostyrils. Experiments with deuterated N,N-dimethylaniline-d6 (PhN(CD3)2) established the involvement of 1,5-H atom transfer in the mechanism.
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Affiliation(s)
- Ganesh Chandra Upreti
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
| | - Tavinder Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
| | - Kirti Khanna
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
| | - Debasish Sahoo
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
| | - Anand Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
- Department of Sustainable Energy Engineering, Kotak School of Sustainability, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
- Chandrakanta Kesavan Center for Energy Policy and Climate Solutions, Indian Institute of Technology Kanpur, Kanpur, UP-208016, India
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3
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Xue L, Gao C, Zhang X, Fan X. Synthesis of Acyl Cyclopentaquinolinones through Simultaneous Construction of the Heterocyclic Scaffold and Introduction of the Acyl Group. J Org Chem 2024; 89:6292-6305. [PMID: 38625738 DOI: 10.1021/acs.joc.4c00307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Presented herein is an effective and concise synthesis of acyl cyclopentaquinolinone derivatives via the cascade reactions of N-(o-ethynylaryl)acrylamides with α-diazo carbonyl compounds. The formation of product involves a visible light-induced radical formation from α-diazo carbonyl compound followed by its addition onto the acrylamide moiety to trigger double radical annulation, single-electron oxidation, and β-elimination. To our knowledge, this is the first example in which the cyclopentaquinolinone scaffold was constructed along with the introduction of an acyl group under visible light irradiation conditions. Compared with literature methods for similar purpose, this newly developed protocol has advantages such as readily accessible substrates, mild reaction conditions, valuable products, concise synthetic procedure, and high sustainability. With all these merits, this method is expected to find wide applications in the construction of related acyl heterocyclic skeletons.
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Affiliation(s)
- Lian Xue
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Chang Gao
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xinying Zhang
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xuesen Fan
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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4
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Xue L, Song X, Zhang X, Fan X. Synthesis of O-Heterocycle Spiro-Fused Cyclopentaquinolinones and Cyclopentaindenes through Visible Light-Induced Radical Cyclization Reactions. J Org Chem 2023; 88:12641-12657. [PMID: 37591490 DOI: 10.1021/acs.joc.3c01317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Presented herein is an effective and sustainable synthesis of O-heterocycle spiro-fused cyclopentaquinolinone and cyclopentaindene derivatives through light-driven cascade reactions of N-(o-ethynylaryl)acrylamides or 2-(2-(phenylethynyl)benzyl)acrylate with various O-heterocycles. Experimental mechanistic studies revealed that these reactions are initiated by visible light-induced radical formation from O-heterocycle and its regioselective addition onto the acrylamide or acrylate moiety followed by 6-exo-dig and 5-endo-trig cascade radical annulation, which is terminated by single electron oxidation and proton elimination. Compared with previously reported synthetic methods for similar purposes, this newly developed protocol has advantages such as a broad substrate scope, extremely mild reaction conditions, excellent atom-economy, high efficiency, and good compatibility with diverse functional groups. With all of these merits, this method is expected to find wide applications in the related research arena.
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Affiliation(s)
- Lian Xue
- Pingyuan Laboratory, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Xia Song
- Pingyuan Laboratory, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Xinying Zhang
- Pingyuan Laboratory, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Xuesen Fan
- Pingyuan Laboratory, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
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5
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Patel RI, Singh J, Sharma A. Visible Light‐Mediated Manipulation of 1,n‐Enynes in Organic Synthesis. ChemCatChem 2022. [DOI: 10.1002/cctc.202200260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Roshan I. Patel
- IIT Roorkee: Indian Institute of Technology Roorkee CHEMISTRY INDIA
| | - Jitender Singh
- IIT Roorkee: Indian Institute of Technology Roorkee CHEMISTRY INDIA
| | - Anuj Sharma
- Indian Institute of Technoology Roorkee Deptartment of Chemistry Room 303DDepartment of Chemistry, IIT Roorkee 247667 Roorkee INDIA
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Vavsari VF, Nikbakht A, Balalaie S. Annulation of 2‐Alkynylanilines: The Versatile Chemical Compounds. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Vaezeh Fathi Vavsari
- KN Toosi: KN Toosi University of Technology Chemistry IRAN (ISLAMIC REPUBLIC OF)
| | - Ali Nikbakht
- K N Toosi University of Technology Faculty of General Science Chemistry Department of Chemistry, Kavian 9, Dr. Shariati Street 15875-4416 Tehran IRAN (ISLAMIC REPUBLIC OF)
| | - Saeed Balalaie
- K N Toosi University of Technology Faculty of General Science Chemistry Department PO Box 15875-4416 15875-4416 Tehran IRAN (ISLAMIC REPUBLIC OF)
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Zheng H, Su J, Zhou Y, Zhu G. Recent Advances on 5- endo-Trig Radical Cyclization of All-Carbon Systems. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202209029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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8
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Correia JTM, Santos MS, Pissinati EF, da Silva GP, Paixão MW. Recent Advances on Photoinduced Cascade Strategies for the Synthesis of N-Heterocycles. CHEM REC 2021; 21:2666-2687. [PMID: 34288377 DOI: 10.1002/tcr.202100160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 06/24/2021] [Accepted: 06/25/2021] [Indexed: 12/13/2022]
Abstract
Over the last decade, visible-light photocatalysis has proved to be a powerful tool for the construction of N-heterocyclic frameworks, important constituents of natural products, insecticides, pharmacologically relevant therapeutic agents and catalysts. This account highlights recent developments and established methods towards the photocatalytic cascades for preparation of different classes of N-heterocycles, giving emphasis on our contribution to the field.
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Affiliation(s)
- José Tiago M Correia
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Marilia S Santos
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Emanuele F Pissinati
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Gustavo P da Silva
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
| | - Márcio W Paixão
- Department of Chemistry, Federal University of São Carlos, Rodovia Washington Luís, km 235 - SP-310 - São Carlos, São Paulo, Brazil -, 13565-905
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Meng Z, Zhang X, Shi M. Visible-light mediated cascade cyclization of ene-vinylidenecyclopropanes: access to fluorinated heterocyclic compounds. Org Chem Front 2021. [DOI: 10.1039/d1qo00540e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A visible-light mediated fluorinated cyclization of ene-vinylidenecyclopropanes along with mechanistic investigations is presented.
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Affiliation(s)
- Zhe Meng
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Xiaoyu Zhang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- China
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