Ammonia → 1-(4-Hydroxybutyl)-3-[2-(2,2,2-trifluoroethyl)guanidino]pyrazole

Participants

Reaction Steps

Mercuric oxide (30.1 g.) was added quickly to a stirred solution of 1-(4-hydroxybutyl)-3-(3-[2,2,2-trifluoroethyl]thioureido)pyrazole (10.4 g.) in methanolic ammonia (5N., 340 ml.). After stirring for 3 hours at room temperature, the mixture was filtered through a pad of diatomaceous earth and the filtrate was evaporated in vacuo to give 1-(4-hydroxybutyl)-3-[2-(2,2,2-trifluoroethyl)guanidino]pyrazole, m.p. 105°-106° (yield 82%).

Provenance & Evidence