反应详情

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.

1. extractionthe mixture was extracted with ethyl acetate
2. washthe extract was washed with sat. aq. sodium chloride solution
3. dry with materialdried over MgSO4
4. filtrationFiltration through silica gel