Hydrochloric Acid → 4-(2,4-Dichlorobenzyloxy)-1-(10-methyl-5,6,7,8,9,10-hexahydropyrido[3',2':4,5]pyrrolo[3,2-c]azepin-2-yl)pyridin-2(1H)-one hydrochloride

Temperature

135 °C

A suspension of 4-(2,4-dichlorobenzyloxy)pyridin-2(1H)-one (85 mg, 0.31 mmol), tert-butyl 2-bromo-10-methyl-7,8,9,10-tetrahydropyrido[3′,2′:4,5]pyrrolo[3,2-c]azepine-6(5H)-carboxylate (131 mg, 0.345 mmol), CuI (71 mg, 0.38 mmol), 8-hydroxyquinoline (9 mg, 0.06 mmol) and Cs2CO3 (112 mg, 0.345 mmol) in DMSO (10 mL) was degassed under reduced pressure for 45 min. The suspension was put under N2 and stirred at 135° C. for 18 h. The suspension was cooled, 9:0.9:0.1 CH2Cl2/MeOH/NH4OH (10 mL) was added, and the resulting suspension was stirred at 25° C. for 30 min. The suspension was passed through a plug of silica gel, and the filtrate was washed with brine. Activated carbon was added to the resulting solution, and the resulting suspension was filtered. The filtrate was dried over Na2SO4 and concentrated under reduced pressure. Flash chromatography on silica gel (Et2O/(8:1.9:0.1 Et2O/MeOH/NH4OH), 100:0 to 0:100) afforded a tan solid. 2 N HCl in Et2O (100 mL) was added to a solution of the tan solid in CH2Cl2 (5 mL) under N2, and the resulting suspension was stirred at 25° C. for 24 h. The suspension was filtered, and the solid was washed with Et2O and put in a vacuum oven at 45° C. for 1 h to afford 102 mg (64%) of the title compound as a white powder: 1H NMR (500 MHz, DMSO-d6) δ 8.88-8.81 (m, 2H), 8.16 (d, J=8.5 Hz, 1H), 7.83 (d, J=7.5 Hz, 1H), 7.74 (d, J=2.5 Hz, 1H), 7.67 (d, J=7.5 Hz, 1H), 7.53 (dd, J=8.0, 2.0 Hz, 1H), 7.38 (d, J=8.0 Hz, 1H), 7.18 (dd, J=8.0, 2.5 Hz, 1H), 6.03 (d, J=2.5 Hz, 1H), 5.21 (s, 2H), 4.52-4.48 (m, 2H), 3.77 (s, 3H), 3.50-3.43 (m, 2H), 3.19-3.12 (m, 2H), 2.13-2.05 (m, 2H); ESI MS m/z 469 [M+H]−

1. customwas degassed under reduced pressure for 45 min
2. temperatureThe suspension was cooled
3. addition9:0.9:0.1 CH2Cl2/MeOH/NH4OH (10 mL) was added
4. stirringthe resulting suspension was stirred at 25° C. for 30 min
5. washthe filtrate was washed with brine
6. additionActivated carbon was added to the resulting solution
7. filtrationthe resulting suspension was filtered
8. dry with materialThe filtrate was dried over Na2SO4
9. concentrationconcentrated under reduced pressure
10. customFlash chromatography on silica gel (Et2O/(8:1.9:0.1 Et2O/MeOH/NH4OH), 100:0 to 0:100) afforded a tan solid
11. stirringthe resulting suspension was stirred at 25° C. for 24 h
12. filtrationThe suspension was filtered
13. washthe solid was washed with Et2O
14. waitput in a vacuum oven at 45° C. for 1 h

ORD record

ord-589d2bf30c714b7baaf10a44d8a66f73

Source dataset

uspto-grants-2014_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08637501B2