A convenient and green approach for the synthesis of 2H-indazolo[2,1- b]phthalazinetriones

摘要

A high yielding and environmentally benign synthesis of 2H-indazolo[2,1-b]phthalazine-1,6,11(13H)-trione derivatives has been achieved using silica-supported KHSO4 catalyst under solvent-free conditions. The methodology adopted is simple, versatile and requires no column chromatography.