反应详情

温度

80 °C

To a solution of 5.0 g (22 mmol) 4-chloro-3-nitrobenzotrifluoride in 100 ml dimethylformamide was added 3.4 ml (24 mmol) triethylamine and 2.8 ml (23 mmol) cyclohexylamine. The reaction mixture was stirred at 80° C. for 2 h. After cooling to 25° C. the reaction mixture was evaporated in vacuo. The residue was stirred with 100 ml water and the precipitate was filtered off. Recrystallization (methanol) gave 3.9 g (61%) N-cyclohexyl-2-nitro-4-trifluoromethylaniline. M.p. 80.1° C., 1H-NMR (CDCl3): 8.4 (1H, s), 8.3 (1H, m), 7.5 (1H, dd), 6.9 (1H, d), 3.5 (1H, broad s).

1. temperatureAfter cooling to 25° C. the reaction mixture
2. customwas evaporated in vacuo
3. stirringThe residue was stirred with 100 ml water
4. filtrationthe precipitate was filtered off
5. customRecrystallization (methanol)