Methyl iodide → 5,7-Dimethoxy-2-(4-(4-methyl-1,4-diazepan-1-yl)phenyl)quinazolin-4(3H)-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-(4-(1,4-diazepan-1-yl)phenyl)-5,7-dimethoxyquinazolin-4(3H)-one (0.150 g, 0.39 mmol) in DMF (20 mL) was added CH3I (0.067 g, 0.47 mmol) and Hünig's Base (0.138 mL, 0.79 mmol). The reaction mixture was heated at 50° C. for 1.5 hours, cooled to room temperature, diluted with ethyl acetate (150 mL), washed with brine (2×100 mL), dried over anhydrous MgSO4, filtered, and concentrated. The residue was purified by flash chromatography on silica gel, eluting with 1:1 CH2Cl2/92:7:1 CHCl3/MeOH/concentrated NH4OH to 100% 92:7:1 CHCl3/MeOH/concentrated NH4OH, to afford the title compound (0.035 g, 23%) as a white solid. 1H NMR (300 MHz, DMSO-d6): δ 11.66 (s, 1H), 8.06 (d, J=9.0 Hz, 2H), 6.78 (d, J=9.0 Hz, 2H), 6.65 (d, J=2.2 Hz, 1H), 6.44 (d, J=2.2 Hz, 1H), 3.87 (s, 3H), 3.83 (s, 3H), 3.57-3.59 (m, 2H), 3.52 (t, J=6.1 Hz, 2H), 2.60-2.64 (m, 2H), 2.45-2.50 (m, 2H), 2.26 (s, 3H), 1.89-1.99 (m, 2H). ESI MS m/z 395 [M+H]+.

Provenance & Evidence