CH2N2Pb → HCID 178433311, compound

Participants

Reaction Steps

Lead cyanamide (8.7 g.) was added to a solution of N,N'-bis-[2-((4-methyl-5-imidazolyl)methylthio)ethyl]thiourea in acetonitrile (100 ml.) and dimethyl formamide (20 ml.) and the resultant suspension was heated under reflux with stirring for 24 hours. Additional lead cyanamide (8.7 g.) was added and heating was continued for 24 hours. Following filtration and concentration, the residue was chromatographed on a column of silica gel, eluting with ethyl acetate-isopropyl alcohol (5:1). Recrystallisation from isopropyl alcohol-isopropyl acetate afforded N-cyano-N',N"-bis-[2-((4-methyl-5-imidazolyl)methylthio)ethyl]guanidine (0.6 g.), m.p. 92°-95°.

Provenance & Evidence