Optically pure ethyl 5-hydroxycyclopent-1-enecarboxylate has been obtained with its acetate in both enantiomeric forms in excellent optical yields from racemic ethyl 5-hydroxycyclopent-1-enecarboxylate by lipase-mediated kinetic resolution. The optically pure (R)-enantiomer thus obtained has been transformed into two naturally occurring iridoid monoterpenes, (+)-mitsugashiwalactone and (-)-dolichodial.
光学纯的乙基5-羟基环戊-1-烯
羧酸酯已通过
脂肪酶介导的动力学分辨率,从外消旋乙基5-羟基环戊-1-烯
羧酸酯中以优异的光学产率获得其
醋酸酯的两种对映异构体。因此获得的光学纯(R)对映体已转化为两种天然存在的
紫杉醇单萜,(+)-三叶
紫杉醇内酯和(-)-多利克醛。