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

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Reaction Steps

The crude compound ethyl 2-(4-(diethoxymethyl)phenyl)-3-(4-fluorophenyl)-4-oxo-1,2,3,4-tetrahydroquinoline-5-carboxylate (4.2 g, 8.54 mmol) and hydrazine monohydrate (5 mL) were added in methanol (60 mL) and the mixture was stirred at room temperature for 16 hr. The resulting mixture was concentrated under reduced pressure to a volume of 40 mL and then filtered to obtain the crude title compound (3.0 g, yield 76%). LC-MS (ESI) m/z: 460 (M+1)+.

Provenance & Evidence