Copper-Catalyzed Oxidative Coupling of Quinazoline-3-Oxides: Synthesis of O -Quinazolinic Carbamates.

Organic carbamates represent a kind of privileged structures in both organic chemistry and industry. Despite the fact that the synthesis of alcohol-based carbamates has been well studied, an efficient access to hydroxamic acid-based carbamates is less explored due to the nucleophilicity of both O and N atoms in hydroxamic acids. Herein, we report a copper-catalyzed oxidative coupling of quinazoline-3-oxides and formamides for the synthesis of O -quinazolinic carbamates. This protocol is featured with practicability, simple starting materials, and operational simplicity.