反应详情

A mixture of N-cyano-N'-{2-[(4-methyl-5-imidazolyl)methylthio]ethyl}-S-methyl isothiourea (3.00 g, 0.0111 mole) and propargyl amine (2.50 g, 0.045 mole) in acetonitrile (60 ml) was stirred at reflux for 65 hours, and then was heated in a stainless steel pressure vessel at 120°-130° for 38 hours. The reaction mixture was cooled, decanted from a tar, and the evaporated to leave a gum (3.57 g). This material was placed on silica gel (100-200 mesh) and eluted with a mixture of methylene chloride (97 parts) and methanol (3 parts). The product obtained from a middle fraction was crystallized by trituration under acetonitrile, and then was recrystallized from acetonitrile to yield the title compound (0.236 g; 7.7%); mp 146°-149.5°.

1. temperatureat reflux for 65 hours
2. temperaturewas heated in a stainless steel pressure vessel at 120°-130° for 38 hours
3. temperatureThe reaction mixture was cooled
4. customdecanted from a tar
5. customthe evaporated