An Efficient One-Pot Synthesis of Naphthoxazinones by a Three-Component Coupling of Naphthol, Aldehydes, and Urea Catalyzed by Zinc Triflate

摘要

A simple and efficient method has been developed for the synthesis of 4-aryl-3,4-dihydronaphtho[2,1-e] [1,3]oxazin-2-one and 1-aryl-1,2-dihydronaphtho[1,2-e][1,3]oxazin-3-one derivatives through a one-pot three-component coupling of alpha or beta-naphthol, aromatic aldehydes and urea using a catalytic amount of zinc triflate in refluxing acetonitrile.