Palladium-Catalyzed Divergent Reactions of 1,6-Enyne Carbonates: Synthesis of Vinylidenepyridines and Vinylidenepyrrolidines
作者:Shu-Chun Zhao、Ke-Gong Ji、Lei Lu、Ting He、An-Xi Zhou、Ru-Long Yan、Shaukat Ali、Xue-Yuan, Liu、Yong-Min Liang
DOI:10.1021/jo202590w
日期:2012.3.16
A method for preparing five- or six-membered heterocyclic compounds from enyne carbonates via palladium catalysis was developed. Enyne carbonates were transformed into 3-vinylidene-1-tosylpyridines 2 in the presence of PdI2 as the catalyst. Using Pd(dba)(2) as the catalyst, 3-vinylidene-1-tosylpyrrolidines 3 were obtained. Further functionalizations of compounds 3 were carried out in a one-pot manner.