Phenylhydrazine → 1,5-Diphenyl-4,5-dihydro-1H-pyrazol-3-amine

Participants

Reaction Steps

A 2.0 g. amount of sodium metal is dissolved in 150 ml. of absolute ethanol, then 40.0 ml. of phenylhydrazine is added followed in 5 minutes by 48.0 ml. of cinnamonitrile. The reaction mixture is refluxed for 3 hours with exothermic crystallization of a product. The product is collected by filtration and washed with water. The material is recrystallized from absolute ethanol to give 56.0 g. of the desired product as a solid, m.p. 195°-197° C.

Provenance & Evidence