反应详情

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 (200 mg, 0.54 mmol) in dichloromethane (30 mL) was added acetic acid (1 mL) followed by the addition of 1-ethylpiperazine (121 mg, 1.63 mmol). After the addition, the mixture was stirred at room temperature overnight. Then the mixture was cooled to 0° C. NaBH(OAc)3 (173 mg, 0.81 mmol) was added. After the addition, the mixture was stirred at this temperature for 12 hr. dichloromethane 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. The crude product was purified by prep-HPLC to give 8-(4-((4-ethylpiperazin-1-yl)methyl)phenyl)-9-phenyl-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one (135 mg, yield 47%) as white solid. 1H-NMR (400 MHz, DMSO-d6) δ (ppm): 1.22 (t, 3H), 2.36-2.44 (m, 1H), 2.74-3.11 (m, 8H), 4.01-4.10 (m, 3H), 4.33 (dd, 1H), 4.78 (dd, 1H), 7.13-7.31 (m, 10H), 7.37 (d, 1H), 7.47 (s, 1H), 7.58 (t, 3H); LC-MS (ESI) m/z: 452 (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. customdichloromethane 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
10. customThe crude product was purified by prep-HPLC