Methylamine → 1H-Pyrazole-4-carboxamide, 1-(2,4-dichlorophenyl)-N-methyl-5-(trifluoromethyl)-

Participants

Reaction Steps

5-(Trifluoromethyl)-1-(2,4-dichlorophenyl)-1H-pyrazole-4-carboxylic acid (1.50 grams, 0.0046 mole) and carbonyldiimidazole (0.94 gram, 0.0058 mole) were dissolved in DMF. The reaction mixture was stirred for 10 minutes, then 7 ml. of 40% aqueous methylamine were added. The reaction mixture was stirred for three hours at room temperature, then poured into 150 ml. of water and filtered. The precipitate was dried to 1.51 grams, then recrystallized from 10:1 cyclohexane/toluene, yielding 1.23 grams of 5-(trifluoromethyl)-1-(2,4-dichlorophenyl)-N-methyl-1H-pyrazole-4-carboxamide, mp=143°-144° C.

Provenance & Evidence