反应详情

A solution of 75 ml of 33% methylamine in ethanol was added to a solution of 10.1 g of N-cyano-N'-[2-(5-methyl-4-imidazolylmethylthio)ethyl]-S-methylisothiourea in 30 ml of ethanol. The reaction mixture was set aside at ambient temperature for 2.5 hours. Following concentration under reduced pressure, the residue was recrystallized twice from isopropanol-petroleum ether to give N-cyano-N'-methyl-N"-[2-(5-methyl-4-imidazolylmethylthio)ethyl]guanidine, m.p. 141°-143°.

1. concentrationconcentration under reduced pressure
2. customthe residue was recrystallized twice from isopropanol-petroleum ether