Acetic Acid → HCID 136186312, compound

Participants

Reaction Steps

To a stirred solution of 4-(3-oxo-9-phenyl-3,7,8,9-tetrahydro-2H-pyrido[4,3,2-de]phthalazin-8-yl)benzaldehyde (150 mg, 0.41 mmol) in dry dichloromethane (20 mL) and MeOH (2 mL) was added acetic acid (120 mg) followed by azetidine (70 mg, 1.23 mmol). After the addition, the mixture was stirred at room temperature overnight. Then sodium triacetoxyborohydride (131 mg, 0.62 mmol) was added at 0° C. After the addition, the mixture was stirred at this temperature for 5 hr. DCM was removed under reduced pressure. The residue was washed with ethyl acetate/methanol (10/1) and filtered. The filtrate was concentrated to give the crude product, which was purified by column chromatography (silica gel, dichloromethane/methanol=100:1 to 15:1) to give the title compound (84 mg, yield 51%) as yellow solid. LC-MS (ESI) m/z: 409(M+1)+. 1H-NMR (400 MHz, CD3OD) δ (ppm): 2.38-2.43 (m, 2H), 3.98 (t, J=8 Hz, 4H), 4.20 (s, 2H), 4.27 (d, J=8 Hz, 1H), 4.77 (d, J=8 Hz, 1H), 7.03-7.05 (m, 2H), 7.10-7.17 (m, 4H), 7.27-7.35 (m, 4H), 7.50-7.52 (m, 1H), 7.57-7.62 (m, 1H).

Provenance & Evidence