1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → N-(tert-butoxycarbonyl)-N'-ethyl-N''-(1-(4-methylpyridin-2-yl)pyrrolidin-3-yl)guanidine

Participants

Reaction Steps

To a solution of 3-amino-1-(4-methylpyridin-2-yl)pyrrolidine (177 mg) and N-(tert-butoxycarbonyl)-N′-ethylthiourea (245 mg) in N,N-dimethylformamide (5 ml) was added 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride (230 mg), and the mixture was stirred for 18 hours. The mixture was diluted with ethyl acetate, washed with water three times and brine, dried over sodium sulfate and evaporated under reduced pressure. The residue was purified by column chromatography (silica gel 25 g, 5% methanol in dichloromethane) to give N-(tert-butoxycarbonyl)-N′-ethyl-N″-(1-(4-methylpyridin-2-yl)-pyrrolidin-3-yl)guanidine (290 mg).

Provenance & Evidence