Highly enantioenriched secondary alcohols were synthesized by treatment of α-carbamoyloxy-2-alkenylboronates and α-carbamoyloxy-alkylboronates with Grignard reagents. An intermediary boronate complex was transformed stereospecifically to the corresponding secondary 2-alkenyl- and alkylboronates by migration of an introduced residue. Oxidative workup furnished the enantioenriched secondary alcohols.
高对映体富集的次级醇通过处理α-
氨基羧氧基-2-烯烃
硼酸酯和α-
氨基羧氧基烷基
硼酸酯与格林雅试剂合成。中间的
硼酸酯络合物通过引入的残基迁移被立体特异性转化为相应的次级2-烯烃和烷基
硼酸酯。氧化后处理提供了对映体富集的次级醇。