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Li N, Gui Y, Chu M, You M, Qiu X, Liu H, Wang S, Deng M, Ji B. Cobalt-Catalyzed Deprotection of Allyl Carboxylic Esters Induced by Hydrogen Atom Transfer. Org Lett 2021; 23:8460-8464. [PMID: 34670095 DOI: 10.1021/acs.orglett.1c03185] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A brief, efficient method has been developed for the removal of the allyl protecting group from allyl carboxylic esters using a Co(II)/TBHP/(Me2SiH)2O catalytic system. This facile strategy displays excellent chemoselectivity, functional group tolerance, and high yields. This transformation probably occurs through the hydrogen atom transfer process, and a Co(III)-six-membered cyclic intermediate is recommended.
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Affiliation(s)
- Nan Li
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Yizhen Gui
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Mengqi Chu
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Mengdi You
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Xiaohan Qiu
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Hejia Liu
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Shiang Wang
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Meng Deng
- Luoyang Key Laboratory of Organic Functional Molecules, College of Food and Drug, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
| | - Baoming Ji
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang, Henan 471934, People's Republic of China
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Abstract
A one-pot procedure for deprotecting carboxylic esters under nonhydrolytic conditions is described. Typical alkyl carboxylates are readily deblocked to the carboxylic acids by the action of aluminum powder and iodine in anhydrous acetonitrile. Cleavage of lactones affords the corresponding ω-iodoalkylcarboxylic acids. Aryl acetylates undergo deacetylation with the participation of the neighboring group. This method enables the selective cleavage of alkyl carboxylic esters in the presence of aryl esters.
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Affiliation(s)
- Dayong Sang
- College of Chemical Engineering and Pharmacy, Jingchu University of Technology, 33 Xiangshan Road, Jingmen, Hubei 448000, P. R. China
| | - Huaxin Yue
- College of Chemical Engineering and Pharmacy, Jingchu University of Technology, 33 Xiangshan Road, Jingmen, Hubei 448000, P. R. China
| | - Yang Fu
- College of Chemical Engineering and Pharmacy, Jingchu University of Technology, 33 Xiangshan Road, Jingmen, Hubei 448000, P. R. China
| | - Juan Tian
- College of Chemical Engineering and Pharmacy, Jingchu University of Technology, 33 Xiangshan Road, Jingmen, Hubei 448000, P. R. China
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Arribat M, Rémond E, Clément S, Lee AVD, Cavelier F. Phospholyl(borane) Amino Acids and Peptides: Stereoselective Synthesis and Fluorescent Properties with Large Stokes Shift. J Am Chem Soc 2018; 140:1028-1034. [DOI: 10.1021/jacs.7b10954] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mathieu Arribat
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247, CNRS, Université de Montpellier, ENSCM, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Emmanuelle Rémond
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247, CNRS, Université de Montpellier, ENSCM, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Sébastien Clément
- Institut Charles Gerhardt Montpellier, ICGM, UMR 5253, CNRS, Université de Montpellier, ENSCM, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Arie Van Der Lee
- Institut Européen des Membranes, IEM, UMR 5635, CNRS, Université de Montpellier, ENSCM, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
| | - Florine Cavelier
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247, CNRS, Université de Montpellier, ENSCM, Place Eugène Bataillon, 34095 Montpellier cedex 5, France
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Rock CL, Groy TL, Trovitch RJ. Carbonyl and ester C–O bond hydrosilylation using κ4-diimine nickel catalysts. Dalton Trans 2018; 47:8807-8816. [DOI: 10.1039/c8dt01857j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
(Ph2PPrDI)Ni chemoselectively catalyzes α-allyl ester C–O bond hydrosilylation to prepare silyl esters with turnover frequencies of up to 990 h−1.
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Affiliation(s)
| | - Thomas L. Groy
- School of Molecular Sciences
- Arizona State University
- Tempe
- USA
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