Hydrochloric Acid → HCID 68658284, compound

Participants

Reaction Steps

NaOH (644 mg, 16.1 mmol) was added to a solution of the 4-(benzyloxy)-1-(2-methyl-9-tosyl-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indol-7-yl)pyridin-2(1H)-one (174 mg, 0.322 mmol) in CH2Cl2/MeOH (10 mL) that had been degassed with N2. The resulting solution was heated at reflux with stirring for 2 h under N2. The solution was allowed to cool, saturated NH4Cl solution and CH2Cl2 were added, and the phases were separated. The organic phase was washed with saturated NaHCO3 solution, dried over Na2SO4 and concentrated under reduced pressure to yield a white solid. 1 M HCl in Et2O (0.38 ml, 0.38 mmol) was added to a solution of the white solid in 9:1 CH2Cl2/MeOH (10 mL) under N2, and the resulting solution was stirred at 25° C. for 30 min. The solution was concentrated, and the residue was diluted with a small amount of CH2Cl2/CH3CN. The resulting suspension was filtered, and the solid was dried under reduced pressure to yield the title compound (46 mg, 34%) as a white solid: mp 168-170° C.; 1H NMR (500 MHz, DMSO-d6) δ 11.30 (s, 1H), 10.50-10.41 (m, 1H), 7.58-7.52 (m, 2H), 7.49-7.40 (m, 4H), 7.39-7.35 (m, 2H), 6.96 (br d, J=8.0 Hz, 1H), 6.09 (br d, J=7.5 Hz, 1H), 5.97 (br s, 1H), 5.15 (s, 2H), 4.60 (br d, J=15.0 Hz, 1H), 4.41 (dd, J=15.0, 7.5 Hz, 1H), 3.78-3.71 (m, 1H), 3.45-3.38 (m, 1H), 3.09-2.98 (m, 5H); ESI MS m/z 386 [M+H]+.

Provenance & Evidence