flexible synthetic method toward highly substituted tetrahydropyran is reported. The key transformation involves atom-efficient sequential metal catalysis consisting of Pd-catalyzed addition of homopropargylic alcohols to alkoxyallene and the subsequent gold(I)-catalyzed cycloisomerization. Notably, this method gives access to both 2,6-cis- and 2,6-trans-tetrahydropyrans possessing diverse substitution patterns
报道了一种针对高度取代的
四氢吡喃的灵活的合成方法。关键的转变涉及原子有效的顺序
金属催化,该催化由Pd催化的均
丙醇加成到烷氧基
丙二烯中,以及随后的Gold(I)催化的环异构化。值得注意的是,该方法可同时获得具有多种取代模式的2,6-顺式-和2,6-反式-
四氢吡喃。