Chelation(SnCl4)-controlled carbonylâene reaction of 2-benzyloxypropionaldehyde with vinyl sulfides is shown to provide a stereodivergent route to chelation-erythro and -threo diastereoisomers of steroid (brassinolide) side chains via the nickel-catalysed coupling reaction of the vinyl sulfide products.
螯合(SnCl4)控制的羰基-烯反应,2-苄氧基
丙醛与
乙烯基硫醚的反应,通过
乙烯基硫醚产品的
镍催化偶联反应,为甾体(
芸苔素内酯)侧链的螯合-赤式和-赤式非对映异构体提供了一种立体分化的途径。