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Kinetic Resolution of Racemic Carboxylic Acids Using Achiral Alcohols by the Promotion of Benzoic Anhydrides and Tetramisole Derivatives: Production of Chiral Nonsteroidal Anti-Inflammatory Drugs and Their Esters
被引:61
作者:
Shiina, Isamu
[1
]
Nakata, Kenya
[1
]
Onda, Yu-suke
[1
]
机构:
[1] Tokyo Univ Sci Kagurazaka, Fac Sci, Dept Appl Chem, Shinjuku Ku, Tokyo 1628601, Japan
关键词:
Kinetic resolution;
Carboxylic acids;
Anhydrides;
D O I:
10.1002/ejoc.200800942
中图分类号:
O62 [有机化学];
学科分类号:
070303 ;
081704 ;
摘要:
A variety of optically active carboxylic esters were produced by kinetic resolution of racemic carboxylic acids by using achiral alcohols, benzoic anhydrides, and Birman's tetramisole-type catalysts. Bis(alpha-naphthyl)methanol is a very effective reagent for producing the corresponding esters with high ee values in the presence of 4-methoxybenzoic anhydride (PMBA) as the coupling reagent by promotion of benzotetramisole derivatives (BTM, alpha-Np-BTM, and beta-Np-BTM). This protocol directly provides chiral carboxylic esters from free carboxylic acids and achiral alcohols by utilizing a transacylation process to generate the mixed anhydrides from the acid components with benzoic anhydride derivatives in the presence of chiral catalysts. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
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页码:5887 / 5890
页数:4
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