An expeditious and solvent free synthesis of azine derivatives using sulfated anatase–titania as a novel solid acid catalyst

Abstract

Solid acid catalyst sulfated anatase–titania (TiO2–SO42−) has been used for the synthesis of azine derivatives from benzophenone hydrazone and ketones/aldehydes by simple physical grinding. This sulfated titania gives an excellent yield with short reaction time and is an inexpensive, easily recyclable catalyst for this reaction.