Lipase-catalyzed poly- and monotransesterification reactions were used in kinetic separations of a commercial mixture of cis,trans-1,4-cyclohexanedimethanol. The reactions were performed with lipases from various sources and with mono- and diesters as the acylating reagents. In a series of monotransesterifications, the highest diastereoselectivity (1:6.5) was obtained with β-chloroethyl hydrocinnamate
脂肪酶催化的聚和单酯交换反应用于动力学分离顺式,反式-
1,4-环己烷二甲醇的商业混合物。用来自各种来源的
脂肪酶并以单酯和二酯作为酰化剂进行反应。在一系列单酯交换反应中,使用β-
氯乙基氢
肉桂酸酯作为酰基供体和荧光假单胞菌的
脂肪酶可得到最高的非对映选择性(1:6.5)。缩聚使用从得到适度的非对映选择性猪胰
脂肪酶富马酸酯(约1:4.5)的顺式/反式单缩合的,并且显着增加非对映选择性(约1:24)顺/反dicondensate产物。