反应详情

温度

70 °C

(2-Amino-thiazol-5-yl)-(2-chloro-phenyl)-methanone The crude N′-[5-(2-chloro-benzoyl)-thiazol-2-yl]-N,N-dimethyl-formamidine was dissolved in 10% hydrochloric acid (150 mL) and heated at 70° C. for 4 hours. The precipitate was filtered, washed with ether, and then suspended in a 10% sodium carbonate solution (250 mL). The suspension was stirred for 1 hour and the precipitate was filtered, washed with ether, and dried in air to give (2-amino-thiazol-5-yl)-(2-chloro-phenyl)-methanone as a brown solid (8.5 g, 36 mmol, 55% from 1-(2-chloro-phenyl)-ethanone). ESI-MS m/z calc. 238.0. found 239.3 (M+1)+1; 1H NMR (DMSO) δ 7.25 (s, 1H), 7.42-7.55 (m, 4H), 8.35 (s, 2H).

1. filtrationThe precipitate was filtered
2. washwashed with ether
3. filtrationthe precipitate was filtered
4. washwashed with ether
5. customdried in air