Acetic Anhydride → Acetamide, N-(4,5-dihydro-1-phenyl-1H-pyrazol-3-yl)-

Participants

Reaction Steps

A 10.0 g. amount of 3-amino-1-phenyl-2-pyrazoline (prepared in Example 8) and 10.0 ml. of acetic anhydride are mixed together and allowed to stand at room temperature for one hour. The resulting solid is collected, dissolved in dichloromethane and passed through a short column of a hydrous magnesium silicate. The effluent is heated and hexane is added to crystallize 1.2 g. of the desired product as yellow prisms, m.p. 190°-191° C.

Provenance & Evidence