Pyrrolidine → 5,7-Dimethoxy-2-(3-methoxy-5-(2-(pyrrolidin-1-yl)ethoxy)phenyl)quinazolin-4(3H)-one

Participants

Reaction Steps

To a solution of 2-[3-(2-bromo-ethoxy)-5-methoxy-phenyl]-5,7-dimethoxy-3H-quinazolin-4-one (7.10 g, 16.0 mmol) in THF (20 mL) was added pyrrolidine (11.38 g, 160.0 mmol) and the reaction mixture was stirred at room temperature for 15 hours. THF was removed under reduced pressure, the residue was purified by column chromatography (silica gel 230-400 mesh; eluting with 5% 2.0 M ammonia in methanol solution in dichloromethane) to give the title compound as a white solid. Yield: 3.2 g (47%). MP 159-160° C. 1H NMR (400 MHz, CDCl3): δ 10.66 (s, 1H), 7.25 (m, 2H), 6.84 (d, J=2.0 Hz, 1H), 6.67 (t, J=2.4 Hz, 1H), 6.45 (d, J=2.0 Hz, 1H), 4.21 (t, J=6.0 Hz, 2H), 3.95 (s, 3H), 3.93 (s, 3H), 3.89 (s, 3H), 2.93 (t, J=6.0 Hz, 2H), 2.64 (m, 4H), 1.80 (m, 4H). MS (ES+) m/z: 426.20 (M+1).

Provenance & Evidence