Propargylamine → 1-cyano-3-[2-[[6-[(dimethylamino)methyl]-1-benzofuran-2-yl]methylsulfanyl]ethyl]-2-prop-2-ynylguanidine

Participants

Reaction Steps

A solutiion of N-cyano-N'-[2-(6-dimethylaminomethyl)-2-benzofuranylmethylthio)ethyl]-S-methylisothiourea (Example 1, Step F) (6.55 g., 0.018 mole) and propargylamine (4.0 g., 0.073 mole) in acetonitrile (100 ml.) is heated in a sealed pressure vessel at 110°-120° C. for 36 hours. The reaction solution is then evaporated at reduced pressure. N-cyano-N'-[2-(6-dimethylaminomethyl-2-benzofuranylmethylthio)ethyl]-N"-(2-propynyl)guanidine is obtained when the residual oil is chromatographed on silica gel with elution by an 8% solution of methanol in chloroform.

Provenance & Evidence