Diversity of Products in the Gold-Catalyzed Cyclization of 1-Epoxy-1-alkynylcyclopropanes by Using 1-Oxyallyl Cations
作者:Chun-Yao Yang、Min-Shiun Lin、Hsuan-Hung Liao、Rai-Shung Liu
DOI:10.1002/chem.200903419
日期:——
A highly stereoselective AuCl3‐catalyzed hydrative cyclization of 1‐epoxy‐1‐alkynylcyclopropanes was observed for cis‐epoxides. Since this cyclization produced 1‐oxyallyl cations efficiently, we accomplished a two‐step [4+2] annulation of epoxyalkynes with dienes and enones, to provide complex oxacyclic compounds with excellent diastereoselectivity (see scheme).