Efficient synthesis of pyranochromene derivatives via three-component reaction of 4-hydroxy-6-methylpyran-1-one with aromatic aldehydes and cyclic 1,3-diketone catalyzed by ZnO nanoparticles

Abstract

Three-component reaction of 4-hydroxy-6-methylpyran-1-one with aromatic aldehydes and cyclic-1,3-diketone catalyzed by ZnO nanoparticles under solvent-free conditions leads a simple and efficient one-pot synthesis of pyrano[4,3-b]chromene-1,9-dione derivatives with high yields. The method has other advantages such as operational simplicity, short reaction time and environmental safety.