Hydrazine hydrate (1:1) → HCID 22125075, compound

Participants

Reaction Steps

A solution of 200 mg (0.31 mmol) of 7-anilino-3-(2-bromophenyl)-3,4-dihydro-1-[3-(2-phthalimidoethyl)phenyl]pyrimido[4,5-d]pyrimidin-2(1H)-one in 20 ml of ethanol was treated with 0.3 ml of hydrazine hydrate. After 20 hours the mixture was evaporated and the product purified by column chromatography on silica gel using dichloromethane/methanol/acetic acid/water (240:24:3:2) for the elution. Product-containing fractions were combined, evaporated and the residue evaporated with toluene. The residue was then dissolved in 50 ml of dichloromethane, washed with 50 ml of saturated aqueous sodium bicarbonate solution, dried over magnesium sulfate, filtered and evaporated to give 45 mg (28%) of 1-[3-(2-aminoethyl)phenyl]-7-anilino-3-(2-bromophenyl)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one as a white solid of melting point 130° C.

Provenance & Evidence