Resolution of methyl cis-3-chloromethyl-2-tetrahydrofurancarboxylate via enzymatic hydrolysis
作者:Jan H. Udding、Jan Fraanje、Kees Goubitz、Henk Hiemstra、W.Nico Speckamp、Bernard Kaptein、Hans E. Schoemaker、Johan Kamphuis
DOI:10.1016/s0957-4166(00)86087-5
日期:1993.3
Kinetic resolution via enzyme catalyzed hydrolysis under neutral conditions was successfully applied to racemic methyl cis-3-chloromethyl-2-tetrahydrofurancarboxylate (1). The highest selectivities were attained with the enzymes acylase-I(E = 51) and α-chymotrypsin (E = 28). The optically active methyl ester recovered in both cases was (+)-(2S,3R)-1. The hydrolysis product spontaneously cyclized under
通过酶催化水解在中性条件下的动力学拆分成功地应用于外消旋顺式-3-氯甲基-2-四氢呋喃甲酸甲酯(1)。用酰基转移酶-I(E = 51)和α-胰凝乳蛋白酶(E = 28)可获得最高的选择性。在两种情况下回收的光学活性甲酯均为(+)-(2 S,3 R)-1。在反应条件下,水解产物自发地环化成双环内酯(-)3a R,6a R)-9,其在一次重结晶后对映体纯。(-)- 9的X射线晶体结构分析 允许确定其绝对配置