Vitamin B-1 supported on alumina as an efficient heterogeneous catalyst for synthesis of tetrahydro-2,6-dioxopyrimidin-4-yl)-2,3-dihydrophthalazine-1,4-dione derivatives

摘要

The efficient synthesis of tetrahydro-2,6-dioxopyrimidin-4-yl)-2,3-dihydrophthalazine-1,4-dione derivatives via four-component reaction of hydrazine hydrate, phthalic anhydride, aromatic aldehydes and barbituric acid using vitamin B-1 supported on alumina (VB1-Al2O3) as a heterogeneous catalyst under thermal solvent-free conditions in excellent yields is described.