and a propargylic organomagnesium reagent giving access to novel and densely functionalized 4‐allenyl‐2‐cyclohexenones (see scheme). These useful synthetic intermediates have been prepared through a cyclization process that involves newly reported reaction steps and an unusually high level of asymmetric induction.
三种
金属的协同作用促进了
铬卡宾络合物,
酰亚胺烯醇
锂和炔丙基
有机镁试剂的一锅选择性偶联,从而可以接触到新型且稠密官能化的4-烯基-2-
环己烯酮(参见方案)。这些有用的合成中间体是通过环合过程制备的,该过程涉及新报道的反应步骤和异常高
水平的不对称诱导。