Racemic fluoroalkyl (E) -vinyl carbinols (1a-d) were kinetically resolved by Sharpless epoxidation. The optical purity of the resolved alcohols was excellent (98% ee) in mono-and difluoromethyl derivatives (1b and 1c) and moderate (60% ee) in a trifluoromethyl compound (1a).
外消旋
氟代烯丙基(E)-
乙烯醇(1a-d)通过Sharpless环氧化反应进行动力学拆分。拆分后的醇的光学纯度在单
氟甲基和二
氟甲基衍
生物(1b和1c)中极佳(98%对映体过量),在三
氟甲基化合物(1a)中适中(60%对映体过量)。