Dimethyl, diethyl and dipropyl esters of (Z)- and (E)-2-methyl-butenedioic
acids (citraconic and mesaconic acid) were hydrolysed by pig live esterase,
PLE. For the diethyl esters the enzyme showed low regio selectivity for bo
th the (Z)- and the (E)-isomers. However, the hydrolysis of dimethyl and di
propyl (Z)-2-methyl-butenedioic acid gave a ratio of the monoesters of 95:5
and 85:15. (C) 2001 Elsevier Science Ltd. All rights reserved.