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.
描述了光学活性的顺式-1,3-环己二羧酸单酯的峰值对映体超过90%(ee),以及制备单酯的方法。一种方法是在水性条件下将顺式-1,3-环己二羧酸二酯与脂肪酶接触,以对映选择性地产生光学活性的顺式-1,3-环己二羧酸单酯。另一种方法是在足以形成顺式环状酸酐的条件下反应顺式和反式-1,3-环己二羧酸混合物,酯化顺式环状酸酐以产生顺式-1,3-环己二羧酸二酯,然后在水性条件下将二酯与脂肪酶接触,以对映选择性地产生光学活性的顺式-1,3-环己二羧酸单酯。