8-(4-(Dimethoxymethyl)phenyl)-9-phenyl-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one → 4-(3-Oxo-9-phenyl-3,7,8,9-tetrahydro-2H-pyrido[4,3,2-de]phthalazin-8-yl)benzaldehyde

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Reaction Steps

To 8-(4-(dimethoxymethyl)phenyl)-9-phenyl-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one (89 mg, 0.22 mmol) was added 20 ml of hydrochloric acid (3 mol/L) and the mixture was stirred at room temperature for 2 h. The resulting mixture was evaporated under reduced pressure to 10 ml and then filtered, 59 mg of solid of 4-(3-oxo-9-phenyl-3,7,8,9-tetrahydro-2H-pyrido[4,3,2-de]phthalazin-8-yl)benzaldehyde was obtained; yield: 73%. LC-MS (ESI) m/z: 368 (M+1)+.

Provenance & Evidence