Hydrochloric Acid → HCID 136262657, compound

Participants

Reaction Steps

To a solution of tert-butyl 4-(4-(5,7-dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)phenyl)piperidine-1-carboxylate (0.210 g, 0.45 mmol) in 1,4-dioxane (2 mL) was added 4M HCl in 1,4-dioxane (1 mL). The resulting solution was stirred at room temperature for 5 hours. Then, the mixture was concentrated in vacuo and the resulting material was purified by flash chromatography on silica gel, eluting with 0% to 10% of MeOH/CH2Cl2. The residue was further purified by flash chromatography on silica gel, eluting with 100% of 92:7:1 CHCl3/MeOH/concentrated NH4OH followed by 100% of 6:3:1 CHCl3/MeOH/concentrated NH4OH, to afford the title compound (0.030 g, 18%). 1H NMR (300 MHz, DMSO-d6): δ 8.11 (d, J=8.3 Hz, 2H), 7.37 (d, J=8.2 Hz, 2H), 6.73 (s, 1H), 6.53 (s, 1H), 3.89 (s, 3H), 3.85 (s, 3H), 2.92-3.20 (m, 2H), 2.56-2.81 (m, 3H), 2.35-2.57 (m, 2H), 1.67-1.88 (m, 2H), 1.38-1.67 (m, 2H). ESI MS m/z 366 [M+H]+.

Provenance & Evidence