Synthesis of 2-Aryl-Substituted Chromans by Intramolecular C-O Bond Formation
作者:Robert Franzén、Yu Wang
DOI:10.1055/s-0031-1290607
日期:2012.4
A synthetic route for the preparation of 2-aryl-substituted chromans from commercially available starting materials and utilizing either a palladium- or copper-catalyzed intramolecular cyclization of aryl bromides is described. Chromans with stereocontrol at C-2 can thus be obtained via a palladium-catalyzed asymmetric allylic etherification procedure utilizing a chiral indole-phosphine oxazoline (IndPHOX) ligand.