Water → N-(3-cyano-2,4-difluorophenyl)-N,1-dimethyl-3-(pentafluoroethyl)-4-(trifluoromethyl)-1H-pyrazole-5-carboxamide

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Reaction Steps

Potassium carbonate (1.28 g, 5.58 mmol, 2.0 eq.) and iodomethane (0.5 ml, 1.2 g, 8.4 mmol, 3.0 eq.) were added to a solution of N-(3-cyano-2,4-difluorophenyl)-1-methyl-3-(pentafluoroethyl)-4-(trifluoromethyl)-1H-pyrazole-5-carboxamide (1.25 g, 2.79 mmol) in DMF (4 ml). After 5 h, water was added, the mixture was extracted with ethyl acetate and the extract was washed with sat. aq. sodium chloride solution and dried over MgSO4. Filtration through silica gel gave N-(3-cyano-2,4-difluorophenyl)-N,1-dimethyl-3-(pentafluoroethyl)-4-(trifluoromethyl)-1H-pyrazole-5-carboxamide (1.27 g, 98%) as a mixture of rotamers which was reacted further without additional purification.

Provenance & Evidence