cis-3,7-diacetoxy-4,6-dimethylcycloheptene (5), which was subjected to asymmetric enzymatic hydrolysis to give hydroxy acetate (6), and this compound was converted in four steps to the (+)-Prelog–Djerassi lactone having high optical purity.
顺式-5,7-二甲基环庚-1,3-二烯(可通过
有机铁化学轻松获得)转化为所有顺式-3,7-
二乙酰氧基-4,6-二甲基
环庚烯(5),并进行不对称酶
水解生成
乙酸羟基酯(6),并将该化合物分四步转化为具有高光学纯度的(+)-Prelog-Djerassi内酯。