Hydrazine hydrate (1:1) → HCID 136385217, compound

Participants

Reaction Steps

A mixture of ethyl 3-(1-methyl-1H-imidazol-5-yl)-4-oxo-2-phenyl-1,2,3,4-tetrahydroquinoline-5-carboxylate (170 mg) in 85% hydrazine monohydrate (3 mL) and methanol (3 mL) was stirred at room temperature for 5 h. Filtered and washed the cake by methanol (2 mL) to obtain a white solid. The solid was dried in vacuum at 50° C. to obtain 9-(1-methyl-1H-imidazol-5-yl)-8-phenyl-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one (70 mg, yield 46%). 1H-NMR (400 MHz, DMSO-d6) δ (ppm): 3.50 (s, 3H), 4.52-4.54 (d, J=9.2 Hz, 1H), 4.83-4.85 (d, J=9.2 Hz, 1H), 6.66 (s, 1H), 7.17-7.19 (d, J=7.6 Hz, 1H), 7.25-7.32 (m, 3H), 7.36-7.44 (m, 5H), 7.56-7.60 (t, J=8.0 Hz, 1H); LC-MS (ESI) m/z: 348 (M+1)+.

Provenance & Evidence