Formaldehyde → 6-[p-(3-(4-phenylpiperid-1-yl)-propionylamino)-phenyl]-4-methyl-3(2H)-pyridazinone

Participants

Reaction Steps

4.0 g (10 millimoles) of 6-[p-(3-(4-phenylpiperid-1-yl)-propionylamino)-phenyl]-4,5-dihydro-3(2H)-pyridazinone in 15 ml of ethanol were refluxed with 1.5 ml of 37% strength formalin solution and 40 ml of 4% strength ethanolic KOH for 3 hours. Insoluble material was filtered off under suction, after which the mother liquor was evaporated down and the product was recrystallized from isopropanol. 2.2 g of 6-[p-(3-(4-phenylpiperid-1-yl)-propionylamino)-phenyl]-4-methyl-3(2H)-pyridazinone were obtained as pale beige crystals of melting point 239°-240° C.

Provenance & Evidence