Phosphorus oxychloride → 4-Chloro-2-{1-[4-(4-methoxy-benzenesulfonyl)-piperazin-1-yl]-ethyl}-quinazoline

Participants

Reaction Conditions

Reaction Steps

In a flask containing of 2-{1-[4-(4-methoxy-benzenesulfonyl)-piperazin-1-yl]-ethyl}-3H-quinazolin-4-one (380.0 mg, 0.89 mmol) in phosphorus oxychloride (20 ml) was heated to 90° C. for 2 hours, then the solvent was concentrated under reduced pressure to give 4-Chloro-2-{1-[4-(4-methoxy-benzenesulfonyl)-piperazin-1-yl]-ethyl}-quinazoline (Yield 394.2 mg, 100%) that was used directly without further purification. 1H NMR (400 MHz, CDCl-3): δ 1.93 (d, 3H, J=6.82 Hz), 3.23-3.04 (m, 3H), 3.54-3.34 (m, 1H), 3.87-3.65 (m, 4H), 3.90 (s, 3H), 4.77 (q, 1H, J=14.15, 6.82 Hz), 7.05 (d, 2H, J=8.84), 7.69 (d, 2H, J=8.84), 7.87 (t, H, J=7.84), 8.10 (t, 1H, J=8.34 Hz), 8.18 (d, 1H, 8.34 Hz), 8.35 (d, 1H, 8.34 Hz). MS m/z calc. 446.12, found (ESI); 447.4 (M+1)+. Retention time 2.67 minutes.

Provenance & Evidence