Highly Efficient Access to Bi- and Tricyclic Ketals through Gold-Catalyzed Tandem Reactions of 4-Acyl-1,6-diynes
作者:Jia Meng、Yu-Long Zhao、Chuan-Qing Ren、You Li、Zhu Li、Qun Liu
DOI:10.1002/chem.200802304
日期:2009.2.9
Single step: Fused bicyclic and bridged tricyclicketals were synthesized in a single step from the reactions of easily available 4‐acyl‐1,6‐diynes with H2O and alkanols (see scheme). The highlyefficient AuCl3‐catalyzed multicomponent domino reactions, involving five CO bond formations, can proceed in a highly regio‐ and diastereoselective manner at room temperature under air and lead to structures