Enzymatic desymmetrization of cis-1,3-cyclohexanedicarboxylic acid diesters
摘要:
cis-1,3-Cyclohexanedicarboxylic acid (1,3-CHDA) monoesters were prepared in high overall yield and high enantiomeric purity using a three step process from cis/trans-1,3-CHDA. The asymmetry is induced by an enzymatic hydrolytic desymmetrization of a meso cis-l,3-CHDA diester. A judicious choice of ester substituents and enzyme can provide >80% overall yield of either enantiomer in >94% ee. (C) 1999 Elsevier Science Ltd. All rights reserved.
Optically active cis-1,3-cyclohexanedicarboxylic acid monoesters with high enantiomeric purity and process for their preparation
申请人:Eastman Chemical Company
公开号:US06210956B1
公开(公告)日:2001-04-03
Optically active cis-1,3-cyclohexanedicarboxylic acid monoesters of >90% enantiomeric excess (ee) and methods of preparing the monoesters are described. One method contacts a cis-1,3-cyclohexanedicarboxylic acid diester with a lipase under aqueous conditions to enantioselectively produce the optically active cis-1,3-cyclohexanedicarboxylic acid monoester. Another method reacts a mixture of cis- and trans-1,3-cyclohexanedicarboxylic acids under conditions sufficient to form a cis-cyclic anhydride, esterifies the cis-cyclic anhydride to produce a cis-1,3-cyclohexanedicarboxylic acid diester and then contacts under aqueous conditions the diester with a lipase to enantioselectively produce the optically active cis-1,3-cyclohexanedicarboxylic acid monoester.
Enzymatic desymmetrization of cis-1,3-cyclohexanedicarboxylic acid diesters
作者:Neil W Boaz
DOI:10.1016/s0957-4166(99)00060-9
日期:1999.3
cis-1,3-Cyclohexanedicarboxylic acid (1,3-CHDA) monoesters were prepared in high overall yield and high enantiomeric purity using a three step process from cis/trans-1,3-CHDA. The asymmetry is induced by an enzymatic hydrolytic desymmetrization of a meso cis-l,3-CHDA diester. A judicious choice of ester substituents and enzyme can provide >80% overall yield of either enantiomer in >94% ee. (C) 1999 Elsevier Science Ltd. All rights reserved.
Optically active cis-1,3-cyclohexanedicarboxylic acid monoesters with
申请人:Eastman Chemical Company
公开号:US06028213A1
公开(公告)日:2000-02-22
Optically active cis-1,3-cyclohexanedicarboxylic acid monoesters of >90% enantiomeric excess (ee) and methods of preparing the monoesters are described. One method contacts a cis-1,3-cyclohexanedicarboxylic acid diester with a lipase under aqueous conditions to enantioselectively produce the optically active cis-1,3-cyclohexanedicarboxylic acid monoester. Another method reacts a mixture of cis- and trans-1,3-cyclohexanedicarboxylic acids under conditions sufficient to form a cis-cyclic anhydride, esterifies the cis-cyclic anhydride to produce a cis-1,3-cyclohexanedicarboxylic acid diester and then contacts under aqueous conditions the diester with a lipase to enantioselectively produce the optically active cis-1,3-cyclohexanedicarboxylic acid monoester.