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Sachin, Sharma T, Chandra D, Sumit, Sharma U. Inherent directing group-enabled Co(III)-catalyzed C-H allylation/vinylation of isoquinolones. Chem Commun (Camb) 2024; 60:5626-5629. [PMID: 38715526 DOI: 10.1039/d4cc01146e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2024]
Abstract
Co(III)-catalysed site-selective C8-allylation and vinylation of isoquinolones with allyl acetate and vinyl acetates has been accomplished. The oxo group of isoquinolone has been utilised as an inherent directing group. Based on preliminary mechanistic studies, a plausible mechanism for the developed reaction has also been delineated. Broad substrate scope with good to excellent yields and post-synthetic transformations of allylated and vinylated isoquinolines highlight the importance of the reaction.
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Affiliation(s)
- Sachin
- C-H Activation & Phytochemistry Lab, Chemical Technology Division, CSIR-IHBT, Palampur 176061, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Tamanna Sharma
- C-H Activation & Phytochemistry Lab, Chemical Technology Division, CSIR-IHBT, Palampur 176061, India.
| | - Devesh Chandra
- C-H Activation & Phytochemistry Lab, Chemical Technology Division, CSIR-IHBT, Palampur 176061, India.
| | - Sumit
- C-H Activation & Phytochemistry Lab, Chemical Technology Division, CSIR-IHBT, Palampur 176061, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Upendra Sharma
- C-H Activation & Phytochemistry Lab, Chemical Technology Division, CSIR-IHBT, Palampur 176061, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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2
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Chen Y, Lu Z, He W, Zhu H, Lu W, Shi J, Sheng J, Xie W. Rhodium-catalyzed annulation of hydrazines with vinylene carbonate to synthesize unsubstituted 1-aminoindole derivatives. RSC Adv 2024; 14:4804-4809. [PMID: 38323018 PMCID: PMC10844929 DOI: 10.1039/d3ra07466h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 01/30/2024] [Indexed: 02/08/2024] Open
Abstract
Herein, we describe rhodium-catalysed C-H bond activation for [3 + 2] annulation using hydrazide and vinylene carbonate, providing an efficient method for synthesising unsubstituted 1-aminoindole compounds. Characterised by high yields, mild reaction conditions, and no need for external oxidants, this transformation demonstrates excellent regioselectivity and a wide tolerance for various functional groups.
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Affiliation(s)
- Yichun Chen
- School of Environment and Chemical Engineering, Foshan University Foshan 528000 China
| | - Ziqi Lu
- School of Environment and Chemical Engineering, Foshan University Foshan 528000 China
| | - Wenfen He
- School of Environment and Chemical Engineering, Foshan University Foshan 528000 China
| | - Huanyi Zhu
- School of Environment and Chemical Engineering, Foshan University Foshan 528000 China
| | - Weilong Lu
- School of Environment and Chemical Engineering, Foshan University Foshan 528000 China
| | - Junjun Shi
- School of Environment and Chemical Engineering, Foshan University Foshan 528000 China
| | - Jie Sheng
- School of Environment and Chemical Engineering, Foshan University Foshan 528000 China
| | - Wucheng Xie
- School of Environment and Chemical Engineering, Foshan University Foshan 528000 China
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Zhu YL, Zhao N, Fu XL, Zhao XY, Li YL, Shao YD, Chen J, Lu Y. Co(III)-Catalyzed C6-Selective C-H Activation/Pyridine Migration of 2-Pyridones with Propiolates. Org Lett 2024; 26:12-17. [PMID: 38127552 DOI: 10.1021/acs.orglett.3c03358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
A versatile Co(III)-catalyzed C6-selective C-H activation/pyridine migration of 2-pyridones with available propiolates as coupling partners was demonstrated. This method features high atom economy, excellent regioselectivity, and good functional group tolerance by employing an inexpensive Co(III) catalyst under mild reaction conditions. Moreover, gram-scale synthesis and late-stage modifications of pharmaceuticals were performed to prove the effectiveness of these synthetic approaches.
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Affiliation(s)
- Yue-Lu Zhu
- School of Chemistry and Chemical Engineering, Heze University, Heze, Shandong 274015, P. R. China
| | - Na Zhao
- School of Chemistry and Chemical Engineering, Heze University, Heze, Shandong 274015, P. R. China
| | - Xin-Long Fu
- School of Chemistry and Chemical Engineering, Heze University, Heze, Shandong 274015, P. R. China
| | - Xin-Yang Zhao
- Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yan-Lin Li
- School of Chemistry and Chemical Engineering, Heze University, Heze, Shandong 274015, P. R. China
| | - You-Dong Shao
- School of Chemistry and Chemical Engineering, Heze University, Heze, Shandong 274015, P. R. China
| | - Jiao Chen
- College of Chemistry & Materials Science, Northwest University, Xi'an, Shaanxi 710127, P. R. China
- College of Life Sciences, Northwest University, Xi'an, Shaanxi 710069, P. R. China
| | - Yi Lu
- Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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Ghosh A, Rana T, Bhaduri N, Pawar AB. Reverse Regioselective Cp*Co(III)-Catalyzed [4 + 2] C-H Annulation of N-Chloroamides with Vinylsilanes: Synthesis of 4-Silylated Isoquinolones and Their Synthetic Utilities. Org Lett 2023; 25:7878-7883. [PMID: 37871162 DOI: 10.1021/acs.orglett.3c03115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
We have developed a Cp*Co(III)-catalyzed reverse regioselective [4 + 2] annulation of N-chlorobenzamides/acrylamides with vinylsilanes for the synthesis of 4-silylated isoquinolones. The reaction was performed at ambient temperature under redox-neutral conditions. The reaction utilized the N-Cl bond as an internal oxidant, furnished the required products with excellent regioselectivities, and demonstrated high functional group tolerance. The synthetic utility of 4-silylated isoquinolones has been demonstrated for the preparation of 4-heteroarylated and 4-alkylated isoquinolones via metal-free C-C couplings. Additionally, 3,4-dihydroisoquinolones were synthesized via protodesilylation of 4-silylated isoquinolones, thus making vinylsilane an ethylene surrogate.
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Affiliation(s)
- Arijit Ghosh
- School of Chemical Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175005, India
| | - Tamanna Rana
- School of Chemical Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175005, India
| | - Nilanjan Bhaduri
- School of Chemical Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175005, India
| | - Amit B Pawar
- School of Chemical Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh 175005, India
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Rana T, Ghosh A, Aher YN, Pawar AB. Harnessing Vinyl Acetate as an Acetylene Equivalent in Redox-Neutral Cp*Co(III)-Catalyzed C-H Activation/Annulation for the Synthesis of Isoquinolones and Pyridones. ACS OMEGA 2023; 8:25262-25271. [PMID: 37483194 PMCID: PMC10357576 DOI: 10.1021/acsomega.3c02352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 06/23/2023] [Indexed: 07/25/2023]
Abstract
We have developed Cp*Co(III)-catalyzed redox-neutral synthesis of 3,4-unsubstituted isoquinoline 1(2H)-ones at ambient temperature using N-chloroamides as a starting material. The reaction utilizes vinyl acetate as an inexpensive and benign acetylene surrogate. The N-Cl bond of the N-chlorobenzamides plays the role of an internal oxidant and hence precludes the need for an external oxidant. The reaction works with a wide range of substrates having various functional groups and a substrate containing a heterocyclic ring. Notably, the reaction is extended to the N-chloroacrylamides in which vinylic C-H activation occurs to furnish the 2-pyridone derivatives. Preliminary mechanistic studies were also conducted to shed light on the mechanism of this reaction.
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