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Gao SY, Tang YY, Yang L, Zhang PL. Direct Hydrodecarboxylation of Carboxylic Acids via N-Hydroxyphthalimide-Mediated Hydrogen Atom Transfer. J Org Chem 2025. [PMID: 40448642 DOI: 10.1021/acs.joc.5c00898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2025]
Abstract
The hydrodecarboxylation of carboxylic acids is a fundamental functional group transformation in chemistry. However, current methods rely on acid preactivation, expensive photocatalysts, or transition-metal catalysts. Herein, we describe an unprecedented transition-metal- and photocatalyst-free chemoselective hydrodecarboxylation of carboxylic acids via N-hydroxyphthalimide-mediated hydrogen atom transfer. This mild method exhibits broad functional group tolerance and enables the conversion of primary, secondary, and tertiary carboxylic acids to alkanes. The versatility of this method is demonstrated through the late-stage functionalization of complex natural products and pharmaceuticals.
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Affiliation(s)
- Si-Yu Gao
- College of Sciences, Tianjin University of Science and Technology, Tianjin 300457, P. R. China
| | - Yi-Yang Tang
- College of Sciences, Tianjin University of Science and Technology, Tianjin 300457, P. R. China
| | - Lan Yang
- College of Sciences, Tianjin University of Science and Technology, Tianjin 300457, P. R. China
| | - Peng-Lin Zhang
- College of Sciences, Tianjin University of Science and Technology, Tianjin 300457, P. R. China
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2
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Xu Y, Shen C, Dong K. Enantioselective Decarboxylative Hydrogen-Atom Transfer Reaction. J Am Chem Soc 2025; 147:6259-6267. [PMID: 39912545 DOI: 10.1021/jacs.4c18464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2025]
Abstract
Direct enantioselective decarboxylative transformations of carboxylic acids have become powerful tools for constructing structurally and functionally diverse molecules. Herein, an unprecedented organocatalyzed protocol for enantioconvergent decarboxylative reduction was established by leveraging dual catalysis of photoredox-mediated radical generation and a thiol-catalyzed asymmetric hydrogen-atom transfer process. With this hydrodecarboxylation, a variety of chiral 3-substituted indolines were attained from the acids in moderate to excellent yields with high enantioselectivities.
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Affiliation(s)
- Yugui Xu
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Chaoren Shen
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
| | - Kaiwu Dong
- State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
- Chang-Kung Chuang Institute, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
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3
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Pylova E, Lasorne B, McClenaghan ND, Jonusauskas G, Taillefer M, Konchenko SN, Prieto A, Jaroschik F. Visible-Light Organic Photosensitizers Based on 2-(2-Aminophenyl)benzothiazoles for Photocycloaddition Reactions. Chemistry 2024; 30:e202401851. [PMID: 39011924 DOI: 10.1002/chem.202401851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2024] [Revised: 07/04/2024] [Accepted: 07/15/2024] [Indexed: 07/17/2024]
Abstract
We have studied 2-(2-aminophenyl)benzothiazole and related derivatives for their photophysical properties in view of employing them as new and readily tunable organic photocatalysts. Their triplet energies were estimated by DFT calculations to be in the range of 52-57 kcal mol-1, suggesting their suitability for the [2+2] photocycloaddition of unsaturated acyl imidazoles with styrene derivatives. Experimental studies have shown that 2-(2-aminophenyl)benzothiazoles comprising alkylamino groups (NHMe, NHiPr) or the native amino group provide the best photocatalytic results in these visible-light mediated [2+2] reactions without the need of any additives, yielding a range of cyclobutane derivatives. A combined experimental and theoretical approach has provided insights into the underlying triplet-triplet energy transfer process.
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Affiliation(s)
- Ekaterina Pylova
- ICGM, Univ Montpellier, CNRS, ENSCM, 34090, Montpellier, France
- Nikolaev Institute of Inorganic Chemistry SB RAS, Prosp. Lavrentieva 3, 630090, Novosibirsk, Russia
- Department of Natural Sciences, National Research University-Novosibirsk State, 630090, Novosibirsk, Russia
| | | | - Nathan D McClenaghan
- Université Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, Talence, F-33400, France
| | - Gediminas Jonusauskas
- Laboratoire Ondes et Matières d'Aquitaine, Université Bordeaux, CNRS, Bordeaux INP, LOMA, UMR 5255, Talence, F-33400, France
| | - Marc Taillefer
- ICGM, Univ Montpellier, CNRS, ENSCM, 34090, Montpellier, France
| | - Sergey N Konchenko
- Nikolaev Institute of Inorganic Chemistry SB RAS, Prosp. Lavrentieva 3, 630090, Novosibirsk, Russia
| | - Alexis Prieto
- ICGM, Univ Montpellier, CNRS, ENSCM, 34090, Montpellier, France
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4
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Hu CH, Li Y. Visible-Light Photoredox-Catalyzed Decarboxylation of α-Oxo Carboxylic Acids to C1-Deuterated Aldehydes and Aldehydes. J Org Chem 2022; 88:6401-6406. [DOI: 10.1021/acs.joc.2c02299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Chun-Hong Hu
- Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi 710054, P. R. China
| | - Yang Li
- Frontier Institute of Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi 710054, P. R. China
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