Enzymatic monobenzoylation of (±)-2-hydroxy-decahydro-5, 5, 8a-trimethyl-1-naphthalenemethanol derivatives (1-4) using vinyl benzoate in organic solvent gave the optically active diols (1-4) and monobenzoates (16-19). The enantiomeric excess (ee) of the enzymatic reaction products were found to be in the range of 11% to 49%. On the other hand, enzymatic hydrolysis of the acetoxybenzylidene acetal (±)-25d, e was found to give more than 90% ee of (10aS)-25d, e in moderate yield. Finally, the 90% ee of (10aS)-25e was converted to the 90% ee of the desired (8aS)-1.
在有机溶剂中使用
苯甲酸乙烯酯对(±)-2-羟基-十氢-5, 5, 8a-三甲基-
1-萘甲醇衍
生物(1-4)进行酶促单苯甲酰化,可得到光学活性二元醇(1-4)和单
苯甲酸酯(16-19)。酶反应产物的对映体过量(ee)在 11% 至 49% 之间。另一方面,对乙酰氧基亚苄基
缩醛 (±)-25d, e 进行酶
水解后发现,(10aS)-25d, e 的ee值超过 90%,收率适中。最后,(10aS)-25e 的 90% ee 转化为所需 (8aS)-1 的 90% ee。