One-pot synthesis of trifluoromethylated phthalans via intramolecular cyclization from 2-alkynylbenzaldehydes
作者:Lijun Xu、Haizhen Jiang、Jian Hao、Gang Zhao
DOI:10.1016/j.tet.2014.04.072
日期:2014.7
Tetrabutylammonium Bromide Catalyzed Tandem Addition/Cyclization of o-Aralkynylaryl Aldehydes with Trimethyl(trifluoromethyl)silane: Synthesis of Trifluoromethyl Group Containing Phthalans
A tetrabutylammonium bromide catalyzed trifluoromethylation/cyclization reaction of o -aralkynylaryl aldehydes with trimethyl(trifluoromethyl)silane and cesium fluoride has been developed. A variety of 1-alkylidene-3-(trifluoromethyl)phthalans were prepared in moderate to excellent yields by tandem nucleophilic addition and cyclization.