反应详情

温度

90 °C

To a stirred mixture of 2-amino-5-chloro-3-nitrobenzotrifluoride (250 mg, 1.043 mmol) in ethanol (4 mL) was added SnCl2.2 H2O (1.174 g, 5.217 mmol) in one portion. The mixture was refluxed at 80° C. (oil bath 90° C.) for 1 h. The solution was cooled to room temperature and ice water (20 g) was added. It was adjusted to pH=7 and extracted with ethyl acetate. The extract was dried (Mg2SO4) and evaporated to give 181 mg (83%) of 2,3-diamino-5-chlorobenzotrifluoride as a brown solid. 1H NMR (CDCl3): δ 3.515 (s, 2H); 3.878 (s, 2H); 6.845 (s, 1H); 6.988 (s, 1H).

1. temperatureThe solution was cooled to room temperature
2. extractionextracted with ethyl acetate
3. dry with materialThe extract was dried (Mg2SO4)
4. customevaporated