Synthesis of polycyclic heterocycles via sequential Au-catalyzed cycloisomerization and Ru-catalyzed metathesis reactions
作者:Chung-Meng Chao、Patrick Yves Toullec、Véronique Michelet
DOI:10.1016/j.tetlet.2009.04.001
日期:2009.7
furo- or cyclopenta- pyran, hexahydropyrano pyrrolidine, and tetrahydroisochromene derivatives is described based on a gold-catalyzed cycloisomerization reaction followed by a Ru-catalyzed ring-closing metathesis. An isomerization of the alkene moiety leading diastereoselectively to cis tetrahydrocyclopenta[c]pyran and tetrahydro-1H-furo[3,4-c]pyran is observed in some cases. The catalytic hydrogenation
基于金催化的环异构化反应,然后Ru催化的闭环复分解,描述了一种顺序有效的催化制备多环杂环的方法,包括四氢呋喃或环戊吡喃,六氢吡咯并吡咯烷和四氢异亚戊烯衍生物。在某些情况下,观察到非对映选择性地导致顺式四氢环戊[ c ]吡喃和四氢-1 H-呋喃[3,4- c ]吡喃的烯烃部分的异构化。这些四氢吡喃的催化氢化反应导致形成多环官能化的饱和化合物。