Acetic Anhydride → HCID 15580725, compound

Participants

Reaction Steps

A mixture of 8.0 g. of 3-amino-1-(p-chlorophenyl)-5-methyl-2-pyrazoline (prepared as described in Example 20), 400 mg. of 4-dimethylaminopyridine and 20.0 ml. of acetic anhydride is allowed to stand at room temperature for 48 hours. The solid formed is collected by filtration, washed with cold acetic anhydride, then with hexane and is dried to give a white solid. The solid is recrystallized from dichloromethane-hexane to give 6.6 g. of the product of the Example as a white solid, m.p. 167°-169° C.

Provenance & Evidence