Triethylamine → 3-(4,4'-dimethoxybenzhydryl)-2-propyl-6-nitroquinazolin-4(3H)-one

Participants

Reaction Steps

To a suspension of 10.0 g (45 mmol) of 2-propyl-6-nitro-quinazolin-4(3H)-one in 160 ml of dry CH2Cl2 was added 9.5 ml (67 mmol) of triethylamine followed by 12.9 g (49 mmol) of 4,4'-dimethoxybenzhydryl chloride. The reaction mixture was stirred for 48 hours and then washed with 10% citric acid (2×20 ml), water (1×20 ml), saturated NaHCO3 (2×20 ml) and brine (1×20 ml). The solution was dried over MgSO4, filtered and concentrated in vacuo. The residue was recrystalised from EtOAc to give 17.3 g of white solid. 85% yield. 1H-NMR (CDCl3): 0.87 (t, 3H, J=7.3 Hz), 1.58 (bm, 2H), 2.72 (t, 2H, J=7.8 Hz), 3.80 (s, 6H), 6.88 (d, 4H, J=9 Hz), 7.19 (d, 4H, J=9.0 Hz), 7.73 (d, 1H, J=8.9 Hz), 8.48 (dd, 1H, J=2.8, 9.0 Hz ), 9.08 (d, 1H, J=2.8 Hz).

Provenance & Evidence