52222-73-8, The chemical industry reduces the impact on the environment during synthesis 52222-73-8, name is 4-(Trifluoromethyl)-1H-pyrazole, I believe this compound will play a more active role in future production and life.
Step A: 5-nitro-2-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyrimidine To a solution of 2-chloro-5-nitropyrimidine (1.5 g, 9.4 mmol) and 4-(trifluoromethyl)-1H-pyrazole (1.41 g, 10.3 mmol) in acetonitrile (40 mL) was added potassium carbonate (2.60 g, 18.8 mmol). The reaction was heated to 80 C. and stirred overnight. The reaction was concentrated and the residue was diluted with water and extracted with ethyl acetate (2*40 mL). The combined organics were washed with brine, dried over sodium sulfate, filtered, and concentrated. Purification by flash column chromatography gave 5-nitro-2-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyrimidine (1.5 g, 62%) as a yellow solid. 1H NMR (400 MHz, CDCl3, delta): 9.48 (s, 2H), 8.92 (s, 1H), 8.05 (s, 1H).
The chemical industry reduces the impact on the environment during synthesis 4-(Trifluoromethyl)-1H-pyrazole. I believe this compound will play a more active role in future production and life.