Potassium Carbonate → 5-(4-chloro-1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl)-4-fluoro-N-methyl-2-nitro-N-propylbenzenamine

Participants

Reaction Conditions

Reaction Steps

At 25° C., 6.83 g (0.02 mole) 4-chloro-3-(2,5-difluoro-4-nitrophenyl)-1-methyl-5-(trifluoromethyl)-1H-pyrazole, 4.1 g (0.03 mole) K2CO3, 3.1 mL (0.03 mole) N-methyl-N-propylamine and a catalytic amount of CuF2 were slurried in 50 mL 1-methyl-2-pyrrolidinone. The reaction mixture was stirred at 35° C. for 2 hours. The mixture was cooled, diluted with 100 mL cold water, and extracted four times with ethyl acetate. The ethyl acetate extracts were washed with brine, dried over anhydrous MgSO4, and stripped in vacuo. The residue was purified chromatographically using 15% ethyl acetate in hexane as the eluent to give 6.8 g (86%) of 5-(4-chloro-1-methyl-5-(trifluoromethyl)-1H-pyrazol-3-yl)-4-fluoro-N-methyl-2-nitro-N-propylbenzeneamine as an orange oil, nD25 51.5534.

Provenance & Evidence