Pyridine → HCID 18980943, compound

Participants

Reaction Steps

To 1.8 g (4.5 mmole) of N-(4-trifluoromethylphenyl)-3-(4-chlorophenyl)-4-(N-methylamino)-4,5-dihydro-1H-pyrazole-1-carboxamide (Example 116) in 10 ml of ethyl acetate cooled to 0° C. was added 0.5 g (4.7 mmole) of isobutyryl chloride and 0.4 g of pyridine. After stirring overnight the mixture was diluted with ethyl acetate, washed with water and brine and dried over anhydrous magnesium sulfate. Concentration in vacuo and trituration with diethyl ether gave 1.7 g of the title compound, a white solid, mp 180°-182° C.

Provenance & Evidence