hydroamination of alkoxyallene and the Ru-catalyzed ring-closing-metathesis as the key strategy, which generates cyclic allylic N,O-acetal as the pivotal intermediate. Notably, this reaction could be performed on a multigram-scale. In addition, both the natural product and its 8-epimer could be obtained with comparable synthetic efficiency.
报告了(-)-swainsonine和8-epimer的简洁灵活的形式合成方法。合成过程以Pd顺序催化烷氧基
丙二烯不对称加
氢胺化和Ru催化的闭环复分解为关键策略,生成环状烯丙基N,O-
缩醛作为关键中间体。值得注意的是,该反应可以在数克规模上进行。另外,
天然产物及其8-末端异构体都可以以相当的合成效率获得。