Potassium Carbonate → HCID 136368556, compound

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Reaction Steps

A mixture of 9-(3-(4-(cyclopropanecarbonyl)piperazine-1-carbonyl)phenyl)-8-(4-(diethoxymethyl)phenyl)-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one (290 mg, 0.48 mmol) in 3N hydrochloric acid (10 mL) was stirred at room temperature overnight. Then the mixture was neutralized with potassium carbonate. The resulting suspension was filtered to give crude. The crude product was purified by prep-HPLC to give the 4-(9-(3-(4-(cyclopropanecarbonyl)piperazine-1-carbonyl)phenyl)-3-oxo-3,7,8,9-tetrahydro-2H-pyrido[4,3,2-de]phthalazin-8-yl)benzaldehyde (20 mg, yield 8%) as a light yellow solid. 1H-NMR (400 MHz, CD3OD) δ (ppm): 0.83-0.91 (m, 4H), 1.94-2.03 (m, 1H), 3.18-3.23 (m, 1H), 3.46-3.82 (m, 7H), 4.42 (d, J=7.6 Hz, 1 H), 4.87 (d, J=7.4 Hz, 1 H), 7.22-7.41 (m, 7H), 7.52-7.54 (d, J=8.0 Hz, 2H), 7.60 (d, 1H), 9.94 (s, 1H); LC-MS (ESI) m/z: 548 (M+1)+.

Provenance & Evidence