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Zhang J, He Z. Lewis Base-Catalyzed Intramolecular Vinylogous Aldol Reaction and Chemoselective Syntheses of 3-Hydroxy-2,3-Disubstituted Dihydrobenzofurans and Indolines. J Org Chem 2023; 88:13102-13114. [PMID: 37672638 DOI: 10.1021/acs.joc.3c01313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
A Lewis base-catalyzed intramolecular vinylogous aldol reaction of o-(allyloxy)phenyl ketoesters or o-(allylamino)phenyl ketoesters has been developed. This reaction provides ready access to 3-hydroxy-2,3-disubstituted dihydrobenzofurans and indolines in high yields with excellent chemoselectivity and diastereoselectivity. An acid-promoted dehydration of such products further extends the utility of the reaction to the synthesis of 2-alkenyl benzofurans and indoles.
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Affiliation(s)
- Jiayong Zhang
- The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Institute of Marine Biomedicine/Postdoctoral Innovation Practice Base, Shenzhen Polytechnic, Shenzhen 518055, China
| | - Zhengjie He
- The State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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Li X, Wang X, Zhang J. Ruthenium-catalysed decarboxylative unsymmetric dual ortho-/ meta-C-H bond functionalization of arenecarboxylic acids. Chem Sci 2023; 14:5470-5476. [PMID: 37234909 PMCID: PMC10208063 DOI: 10.1039/d3sc01226c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 04/04/2023] [Indexed: 05/28/2023] Open
Abstract
Here, we describe a ruthenium-catalysed decarboxylative unsymmetric ortho-C-H azaarylation/meta-C-H alkylation via a traceless directing group relay strategy. The installation of a 2-pyridyl functionality via carboxyl directed ortho-C-H activation is critical to promote decarboxylation and enable meta-C-H bond alkylation to streamline the synthesis of 4-azaaryl-benzo-fused five-membered heterocycles. This protocol is characterized by high regio- and chemoselectivity, broad substrate scopes, and good functional group tolerance under redox-neutral conditions.
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Affiliation(s)
- Xiankai Li
- The Institute for Advanced Studies, Wuhan University Wuhan Hubei Province 430072 China
| | - Xiaofei Wang
- The Institute for Advanced Studies, Wuhan University Wuhan Hubei Province 430072 China
| | - Jing Zhang
- The Institute for Advanced Studies, Wuhan University Wuhan Hubei Province 430072 China
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Rh(III)-catalyzed twofold unsymmetrical C H alkenylation-annulation/amidation reaction enabled delivery of diverse furoquinazolinones. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Zhang L, He J, Zhang P, Zhu D, Zheng K, Shen C. Visible-light-induced C–H sulfenylation of quinoxalin-2(1H)-ones with disulfides by sustainable cerium catalysis. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Rampon D, Seckler D, da Luz EQ, Paixão DB, Larroza AME, Schneider PH, Alves D. Transition metal catalysed direct sulfanylation of unreactive C-H bonds: an overview of the last two decades. Org Biomol Chem 2022; 20:6072-6177. [DOI: 10.1039/d2ob00986b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal catalysed direct sulfanylations of unreactive C-H bonds have become a unique and straightforward synthetic strategy in late-stage C-S bond formation of relevant complex molecules. Such transformations have represented...
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Tsang YL, Choy PY, Leung MP, He X, Kwong FY. Recent advances in rhodium-catalysed cross-dehydrogenative-coupling between two C(sp2)-H bonds. Org Chem Front 2022. [DOI: 10.1039/d1qo01948a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rhodium-catalysed cross-dehydrogenative coupling (CDC) has received considerable attention in recent years. This modern technology has been considered as an attractive synthetic tool for selective C−C bond formation due to (1)...
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Ouyang W, Cai X, Chen X, Wang J, Rao J, Gao Y, Huo Y, Chen Q, Li X. Sequential C-H activation enabled expedient delivery of polyfunctional arenes. Chem Commun (Camb) 2021; 57:8075-8078. [PMID: 34296709 DOI: 10.1039/d1cc03243g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Modular construction of polyfunctional arenes from abundant feedstocks stands as an unremitting pursue in synthetic chemistry, accelerating the discovery of drugs and materials. Herein, using the multiple C-H activation strategy with versatile imidate esters, the expedient delivery of molecular libraries of densely functionalized sulfur-containing arenes was achieved, which enabled the concise construction of biologically active molecules, such as Bipenamol.
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Affiliation(s)
- Wensen Ouyang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Xiaoqing Cai
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Xiaojian Chen
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Jie Wang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Jianhang Rao
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Yang Gao
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Yanping Huo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Qian Chen
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Xianwei Li
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China.
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Hao J, Ge Y, Yang L, Wang J, Luan X. Highly regioselective Ru(II)-catalyzed [3+2] spiroannulation of 1-aryl-2-naphthols with alkynes via a double directing group strategy. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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