Hydrazine hydrate (1:1) → 9-(1-benzyl-4-methyl-1H-imidazol-2-yl)-8-phenyl-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one

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Reaction Steps

A mixture of methyl 3-(1-benzyl-4-methyl-1H-imidazol-2-yl)-4-oxo-2-phenyl-1,2,3,4-tetrahydroquinoline-5-carboxylate (250 mg, 0.57 mmol) and hydrazine monohydrate (3 mL) was stirred room temperature for 5 h. The resulting mixture was evaporated under reduced pressure to 15 ml and then filtered; the filtrate was concentrated to give 9-(1-benzyl-4-methyl-1H-imidazol-2-yl)-8-phenyl-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one as a white solid (40 mg, yield 16%). LC-MS (ESI) m/z: 434 (M+1)+.

Provenance & Evidence