Access to divergent benzo-heterocycles via a catalyst-dependent strategy in the controllable cyclization of o-alkynyl-N-methoxyl-benzamides†
Dong Ding,Tao Mou,Jiahui Xue
Chemical Communications Pub Date : 04/18/2017 00:00:00 , DOI:10.1039/C7CC01861D
Abstract

A chemo- and regio-selectively controllable approach for construction of diverse benzo-heterocycles is established. A new strategy for using the ligand effect in gold catalysis to control the regioselectivity in the cyclization of o-alkynyl-N-methoxyl-benzamide is successfully achieved. Meanwhile, the chemoselectivity between nitrogen and oxygen nucleophiles is precisely switched by gold and platinum catalysts.

Graphical abstract: Access to divergent benzo-heterocycles via a catalyst-dependent strategy in the controllable cyclization of o-alkynyl-N-methoxyl-benzamides