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

Participants

Reaction Conditions

Reaction Steps

A mixture of methyl 3-(3-(4-(cyclopropanecarbonyl)piperazine-1-carbonyl)phenyl)-4-oxo-2-phenyl-1,2,3,4-tetrahydroquinoline-5-carboxylate (64 mg, 0.12 mmol) in 85% hydrazine monohydrate (5 mL) and methanol (2 mL) was stirred at 25° C. for 4 hr. The mixture was extracted with ethyl acetate (50 mL×3). The combined organic layers were washed with brine, dried over anhydrous sodium sulfate, and concentrated to give crude product. The crude product was purified by prep-HPLC to give 9-(3-(4-(cyclopropanecarbonyl)piperazine-1-carbonyl)phenyl)-8-phenyl-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one (8 mg, yield 13%) as a light yellow solid. 1H-NMR (400 MHz, CD3OD) δ (ppm): 0.73-0.81 (m, 4H), 1.18-1.19 (m, 1H), 3.20-3.71 (m, 8H), 4.23-4.25 (d, J=10.0 Hz, 1H), 4.59-4.61 (d, J=8.4 Hz, 1H), 7.08-7.26 (m, 10H), 7.45-7.54 (m, 2H); LC-MS (ESI) m/z: 520(M+1)+.

Provenance & Evidence