A method for the C‐3 functionalization of 2‐oxindoles through the Lewis‐acid‐promoted opening of spiroepoxyoxindoles with allylsilanes to give Hosomi–Sakurai‐type products as well as spirocyclic oxindoles with all‐carbon quaternary centres has been developed. A formal synthesis of (±)‐physovenine was accomplished in five steps using this approach.
已开发出一种方法,该方法通过
路易斯酸促进的烯丙基
硅烷螺环氧基氧
吲哚的
路易斯酸促进的开环反应,生成Hosomi-Sakurai型产物以及具有全碳四元中心的螺环氧
吲哚,从而对2-氧
吲哚进行C-3官能化。使用这种方法,可以在五个步骤中完成(±)-植物蛇毒的正式合成。