Asymmetric Au-catalyzed cycloisomerization of 1,6-enynes: An entry to bicyclo[4.1.0]heptene
作者:Alexandre Pradal、Chung-Meng Chao、Patrick Y Toullec、Véronique Michelet
DOI:10.3762/bjoc.7.116
日期:——
A comprehensive study on the asymmetric gold-catalyzedcycloisomerizationreaction of heteroatom tethered 1,6-enynes is described. The cycloisomerizationreactions were conducted in the presence of the chiral cationic Au(I) catalyst consisting of (R)-4-MeO-3,5-(t-Bu)(2)-MeOBIPHEP-(AuCl)(2) complex and silver salts (AgOTf or AgNTf(2)) in toluene under mild conditions to afford functionalized bicyclo[4