反应详情

To a stirred solution of 4-(8-(4-formylphenyl)-3-oxo-3,7,8,9-tetrahydro-2H-pyrido[4,3,2-de]phthalazin-9-yl)-N,N-dimethylbenzamide (140 mg, 0.32 mmol) in dried DCM (20 mL) was added acetic acid followed by dimethylamine (57 mg, 1.3 mmol). After the addition, the mixture was stirred at room temperature overnight. Then the mixture was cooled to 0° C. Sodium borohydride (102 mg, 0.48 mmol) was added. After the addition, the mixture was stirred at this temperature for 12 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 prep-HPLC to give the title compound as a white solid (15 mg, yield 10%). 1H-NMR (400 MHz, CD3OD) δ (ppm): 2.19 (dd, 6H), 2.93 (s, 3H), 3.06 (s, 3H), 3.40 (dd, 2H), 4.34 (d, 1H), 4.16-7.19 (m, 5H), 7.23-7.26 (m, 4H), 7.54 (d, 1H), 7.61 (t, 1H). LC-MS (ESI) m/z: 468 (M+1)+.

1. additionAfter the addition
2. temperatureThen the mixture was cooled to 0° C
3. additionAfter the addition
4. stirringthe mixture was stirred at this temperature for 12 hr
5. customDCM was removed under reduced pressure
6. washThe residue was washed with ethyl acetate/methanol (10/1)
7. filtrationfiltered
8. concentrationThe filtrate was concentrated
9. customto give the crude product, which
10. customwas purified by prep-HPLC