ZnO Nanoparticles: An efficient green reusable catalyst for the synthesis of 3-formyl benzopyranones chalcones by Claisen-Schmidt reaction under solvent-free condition

摘要

An efficient environmentally benign protocol is reported for the production of benzopyranes based chalcones. In this protocol, yield is very high, reaction time is very small, work up is very simple, catalyst can be recycled, and it is free of any hazardous by-product formation during workup.