反应详情

温度

90 °C

To a mixture of 2-(2,6-dichloro-phenyl)-N-(4,6-dichloro-pyrimidin-5-yl)-acetamide (77.0 g, 221 mmol), thiourea (16.8 g, 221 mmol), and EtOH (500 mL) was added formic acid (3 mL) at rt. The resulting mixture was heated to 90° C. After 12 h, the reaction mixture was cooled and concentrated. The resulting residue was collected by filtration and washed with H2O (100 mL) followed by hexanes (100 mL). The title compound as a dark brown solid was further dried by high vacuum for 12 h and used crude (68 g, 70% apparent purity by analytical HPLC). An analytically pure sample could be obtained by purified by preparative reverse-phase HPLC to afford the title compound as a colorless solid. MS (ESI): mass calcd. for C12H7Cl2N3OS, 310.9; m/z found, 312.0 [M+H]+. 1H NMR (CD3OD): 8.04 (s, 1H), 7.44-7.37 (m, 2H), 7.31-7.26 (m, 1H), 4.70 (s, 2H).

1. temperaturethe reaction mixture was cooled
2. concentrationconcentrated
3. filtrationThe resulting residue was collected by filtration
4. washwashed with H2O (100 mL)
5. dry with materialThe title compound as a dark brown solid was further dried by high vacuum for 12 h
6. customAn analytically pure sample could be obtained
7. customby purified by preparative reverse-phase HPLC