Pyridine → HCID 18980960, compound

Participants

Reaction Conditions

Reaction Steps

To 3.0 g (6.7 mmole) of N-(4-trifluoromethylphenyl)-3-(4-propoxyphenyl)-4-(N-propylamino)-4,5,-dihydro-1H-pyrazole-1-carboxamide (Example 586) dissolved in 25 ml of ethyl acetate and cooled to 0° C., was added 2.4 g (30 mmole) of pyridine and 4.0 g (28 mmole) of formic acetic anhydride mixture (Example 621a). After 30 minutes, the reaction mixture was washed with water and brine, concentrated in vacuo, and chromatographed over silica gel using hexanes and ethyl acetate to yield 2.5 g of the desired compound, mp 161°-163° C.

Provenance & Evidence