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Firuz ME, Rajai-Daryasarei S, Rominger F, Biglari A, Balalaie S. Mn-Mediated Direct Regioselective C-H Trifluoromethylation of Imidazopyridines and Quinoxalines. J Org Chem 2023. [PMID: 37471701 DOI: 10.1021/acs.joc.3c00621] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
A simple and highly efficient strategy has been developed for direct C-H trifluoromethylation at C-3 of imidazopyridines and C-8 of quinoxalines with readily available Langlois reagent through KMnO4/AcOH system. This protocol showed broad substrate scope and afforded moderate-to-excellent yields of both products. It is the first report that the functionalization of quinoxalines occurred regioselectively at the C-8 position of quinoxalines. Mechanistic studies revealed that reaction proceeded via radical pathway.
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Affiliation(s)
- Mahdieh Esi Firuz
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran 19697-64499, Iran
| | - Saideh Rajai-Daryasarei
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran 19697-64499, Iran
| | - Frank Rominger
- Organisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 271, Heidelberg 69120, Germany
| | - Abbas Biglari
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Prof. Sobouti Boulevard, Zanjan 45137-66731, Iran
| | - Saeed Balalaie
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box 15875-4416, Tehran 19697-64499, Iran
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Zhang J, Deng Y, Mo N, Chen L. Advances in Radical Mediated 1,2-Aryl Migration Reactions of α, α-Diarylallyl Alcohols. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202208028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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Wang F, Fu R, Chen J, Rong J, Wang E, Zhang J, Zhang Z, Jiang Y. Metal-free synthesis of gem-difluorinated heterocycles from enaminones and difluorocarbene precursors. Chem Commun (Camb) 2022; 58:3477-3480. [PMID: 35191446 DOI: 10.1039/d2cc00383j] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A cascade strategy to synthesise gem-difluorinated 2H-furans from reactions of BrCF2CO2Et with enaminones has been described. The reactions tolerate a wide variety of functional groups under metal-free conditions. An active aminocyclopropane is proposed to be a key intermediate through the cyclopropanation of difluorocarbene with enaminones, which further triggers a regioselective C-C bond cleavage in situ to afford the corresponding gem-difluorinated 2H-furans.
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Affiliation(s)
- Fei Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, China.
| | - Rui Fu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, China.
| | - Jie Chen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, China. .,Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Jiaxin Rong
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, China.
| | - Enfu Wang
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Jian Zhang
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Zhengyu Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, China.
| | - Yaojia Jiang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing, 211816, China. .,Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
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Ma ZW, Wang CC, Chen XP, Sun B, Tao JC, Lv QJ. Asymmetric Synthesis of 2,3-Dihydrofurans via Squaramide Catalyzed Michael-Alkylation Reaction. LETT ORG CHEM 2021. [DOI: 10.2174/1570178619666211231112237] [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
Abstract:
Asymmetric Catalysis, Dihydrofuran, Michael-Alkylation Reaction, Tertiary Amine-Squaramide, Organocatalysis, α-Bromonitroalkene
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Affiliation(s)
- Zhi-Wei Ma
- Faculty of Science, Henan University of Animal Husbandry and Economy, Zhengzhou, P. R. China
| | - Chuan-Chuan Wang
- Faculty of Science, Henan University of Animal Husbandry and Economy, Zhengzhou, P. R. China
| | - Xiao-Pei Chen
- Faculty of Science, Henan University of Animal Husbandry and Economy, Zhengzhou, P. R. China
| | - Bin Sun
- College of Chemistry, Zhengzhou University, Zhengzhou, P. R. China
| | - Jing-Chao Tao
- College of Chemistry, Zhengzhou University, Zhengzhou, P. R. China
| | - Quan-Jian Lv
- Faculty of Science, Henan University of Animal Husbandry and Economy, Zhengzhou, P. R. China
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