AlCl3 supported on nano silica as an efficient catalyst for the preparation of coumarin

Abstract

The Pechmann condensation has been used as a simple and efficient method for the preparation of coumarin derivatives, which phenols and ethyl acetoacetate were reacted in the presence of AlCl₃ supported on nano silica as an efficient catalyst at 110 ^oC under solvent free condition to form products with good to excellent yield (55 -90%), which are identified by spectroscopic method ( FT-IR, NMR) and melting points and compared with reference samples.