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Lu YC, West JG. Chemoselective Decarboxylative Protonation Enabled by Cooperative Earth-Abundant Element Catalysis. Angew Chem Int Ed Engl 2023; 62:e202213055. [PMID: 36350328 PMCID: PMC9839625 DOI: 10.1002/anie.202213055] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 11/08/2022] [Accepted: 11/09/2022] [Indexed: 11/11/2022]
Abstract
Decarboxylative protonation is a general deletion tactic to replace polar carboxylic acid groups with hydrogen or its isotope. Current methods rely on the pre-activation of acids, non-sustainable hydrogen sources, and/or expensive/highly oxidizing photocatalysts, presenting challenges to their wide adoption. Here we show that a cooperative iron/thiol catalyst system can readily achieve this transformation, hydrodecarboxylating a wide range of activated and unactivated carboxylic acids and overcoming scope limitations in previous direct methods. The reaction is readily scaled in batch configuration and can be directly performed in deuterated solvent to afford high yields of d-incorporated products with excellent isotope incorporation efficiency; characteristics not attainable in previous photocatalyzed approaches. Preliminary mechanistic studies indicate a radical mechanism and kinetic results of unactivated acids (KIE=1) are consistent with a light-limited reaction.
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Affiliation(s)
- Yen-Chu Lu
- Department of Chemistry, Rice University, 6100 Main St, Houston, TX 77005, USA
| | - Julian G West
- Department of Chemistry, Rice University, 6100 Main St, Houston, TX 77005, USA
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He XX, Chang HH, Zhao YX, Li XJ, Liu SA, Zang ZL, Zhou CH, Cai GX. CuCl 2 -Catalyzed α-Chloroketonation of Aromatic Alkenes via Visible-Light-Induced LMCT. Chem Asian J 2023; 18:e202200954. [PMID: 36378015 DOI: 10.1002/asia.202200954] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 11/02/2022] [Indexed: 11/17/2022]
Abstract
Here we report a copper-catalyzed protocol for the synthesis of α-chloroketones from aromatic alkenes including electron-deficient olefins under visible-light irradiation. Preliminary mechanistic studies show that the peroxo Cu(II) species is the key intermediate and hydroperoxyl (HOO⋅) and chlorine (Cl⋅) radicals can be generated by ligand-to-metal charge transfer (LMCT).
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Affiliation(s)
- Xing-Xian He
- Institute of Bioorganic & Medicinal Chemistry, School of Chemistry, Chemical Engineering, Key Laboratory of Quality and Safety Control for Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400715, P. R. China
| | - Huan-Huan Chang
- Institute of Bioorganic & Medicinal Chemistry, School of Chemistry, Chemical Engineering, Key Laboratory of Quality and Safety Control for Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400715, P. R. China
| | - Ying-Xue Zhao
- Institute of Bioorganic & Medicinal Chemistry, School of Chemistry, Chemical Engineering, Key Laboratory of Quality and Safety Control for Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400715, P. R. China
| | - Xiang-Jie Li
- Institute of Bioorganic & Medicinal Chemistry, School of Chemistry, Chemical Engineering, Key Laboratory of Quality and Safety Control for Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400715, P. R. China
| | - Sheng-An Liu
- Institute of Bioorganic & Medicinal Chemistry, School of Chemistry, Chemical Engineering, Key Laboratory of Quality and Safety Control for Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400715, P. R. China
| | - Zhong-Lin Zang
- Institute of Bioorganic & Medicinal Chemistry, School of Chemistry, Chemical Engineering, Key Laboratory of Quality and Safety Control for Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400715, P. R. China
| | - Cheng-He Zhou
- Institute of Bioorganic & Medicinal Chemistry, School of Chemistry, Chemical Engineering, Key Laboratory of Quality and Safety Control for Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400715, P. R. China
| | - Gui-Xin Cai
- Institute of Bioorganic & Medicinal Chemistry, School of Chemistry, Chemical Engineering, Key Laboratory of Quality and Safety Control for Citrus Fruits, Ministry of Agriculture and Rural Affairs, Southwest University, Chongqing, 400715, P. R. China
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Jannapu Reddy R, Waheed M, Haritha Kumari A, Rama Krishna G. Interrupted CuAAC‐Thiolation for the Construction of 1,2,3‐Triazole‐Fused Eight‐Membered Heterocycles from
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‐Propargyl derived Benzyl Thiosulfonates with Organic Azides. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101256] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Raju Jannapu Reddy
- Department of Chemistry, University College of Science Osmania University Hyderabad 500 007 India
| | - Md. Waheed
- Department of Chemistry, University College of Science Osmania University Hyderabad 500 007 India
| | - Arram Haritha Kumari
- Department of Chemistry, University College of Science Osmania University Hyderabad 500 007 India
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