FeCl3-catalyzed three-component reaction: a novel synthesis of tetrahydro-2,6-dioxopyrimidin-4-yl-2,3-dihydrophthalazine-1,4-dione derivatives under solvent-free conditions
under solvent-freeconditions to afford the corresponding tetrahydro-2,6-dioxopyrimidin-4-yl)-2,3-dihydrophthalazine-1,4-dione derivatives in excellent yields. This method provides high yields, shorter reaction time, and mild reactionconditions. This is the first example of the condensation of phthalhydrazide, aldehydes, and barbituric acid to provide a novel series of phthalhydrazide derivatives.