p-Toluenesulfonic acid → 3-(4-sec-butylphenyl)-2-(4-(2-hydroxyethoxy)-3,5-dimethylphenyl)quinazolin-4(3H)-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-amino-N-(4-sec-butylphenyl)benzamide (1.27 g, 4.73 mmol) in N,N-dimethyl acetamide (20 mL) were added 4-(2-hydroxy-ethoxy)-3,5-dimethyl-benzaldehyde (D) (0.92 g, 4.7 mmol), sodium hydrogen sulphite (58.5 wt %) (0.95 g, 5.2 mmol) and p-toluenesulfonic acid (0.18 g, 0.95 mmol). The reaction mixture was stirred at 120° C. overnight, and cooled to room temperature. The solvent was removed under reduced pressure and water (100 mL) was added. The mixture was extracted with ethyl acetate (200 mL). The organic phase was washed with water (2×100 mL), then brine (100 mL), and dried over anhydrous Na2SO4. Removal of solvent gave crude compound, which was purified by the Simpliflash system (30% ethyl acetate in hexanes as eluent) to give the title compound (E) as a white solid. Yield: 0.34 g (16%). MP 152-153° C. 1H-NMR (400 MHz, CDCl3): δ 8.36-8.34 (m, 1H), 7.81-7.80 (m, 2H), 7.54-7.50 (m, 1H), 7.13 (d, J=6.26 Hz, 2H), 7.06 (d, J=8.21 Hz, 2H), 6.98 (s, 2H), 3.92-3.88 (m, 2H), 3.78-3.76 (m, 2H), 2.56-2.54 (m, 1H), 2.13 (s, 6H), 2.06 (t, J=6.26 Hz, 1H), 1.60-1.48 (m, 2H), 1.20 (d, J=7.04 Hz, 3H), 0.727 (t, J=7.43 Hz, 3H). MS (ES+) m/z: 443.01 (M+1) (100%).

Provenance & Evidence