Pyrazolo(1,5-a)pyrimidine-3-carbonitrile → 4,5,6,7-Tetrahydropyrazolo[1,5-a]pyrimidine-3-carbonitrile

Participants

Reaction Steps

To a stirred mixture of 4.0 g of pyrazolo[1,5-a]-pyrimidine-3-carbonitrile in 200 ml of methyl alcohol under nitrogen at, room temperature, was added, one at a time, 3 pellets of sodium borohydride. The mixture was stirred for several hours and then was allowed to stand at room temperature. The product was collected by filtration to give 1.75 g of 4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine-3-carbonitrile, mp 206°-207° C.

Provenance & Evidence