反应详情

温度

55 °C

3-Cyano-4-isobutoxybenzothioamide (100.0 g), ethyl-2-chloroacetoacetate (91.29 g), and isopropyl alcohol (700 mL) were placed into a round bottom flask and stirred for about 30 minutes. The mixture was heated to reflux and maintained at that temperature until reaction completion. After the reaction was complete, the mass was cooled to about 55° C. and maintained for about 30 minutes. The mass was filtered at the same temperature and the solid was washed with hot isopropyl alcohol (400 mL). The wet solid was dried at about 60° C. to a constant weight to yield 156.4 g of the title compound. Purity by HPLC: 98.8%.

1. temperatureThe mixture was heated
2. temperatureto reflux
3. temperaturemaintained at that temperature until reaction completion
4. temperaturemaintained for about 30 minutes
5. filtrationThe mass was filtered at the same temperature
6. washthe solid was washed with hot isopropyl alcohol (400 mL)
7. customThe wet solid was dried at about 60° C. to a constant weight