An Efficient Three Component Synthesis of 1H-Indazolo[2, 1-b]phthalazine-triones Catalyzed by Orthophosphoric Acid in Water-Phenol System

Abstract

Abstract:Simple method for the synthesis of 1H-Indazolo [2,1-b]phthalazine-triones via one pot three component condensation of phthalhydrazide, aldehyde and dimedone catalyzed by orthophosphoric acid in water-phenol system is reported. This synthetic procedure proves with extremely lower reaction timings, high yields, recyclable of catalyst and green solvent system.