Organocatalytic Asymmetric Friedel−Crafts Alkylation/Cyclization Cascade Reaction of 1-Naphthols and α,β-Unsaturated Aldehydes: An Enantioselective Synthesis of Chromanes and Dihydrobenzopyranes
作者:Liang Hong、Lei Wang、Wangsheng Sun、Kwokyin Wong、Rui Wang
DOI:10.1021/jo901409d
日期:2009.9.4
An enantioselective Friedel−Crafts alkylation/cyclization cascade reaction of 1-naphthols and α,β-unsaturated aldehydes promoted by diphenylprolinol ether has been developed. The method affords one-pot access to chiral and synthetically useful chromanes and dihydrobenzopyranes in high yields and enantioselectivities from readily available compounds. In addition, the addition/cyclization products could