反应详情

A mixture of 2-mercaptopyrimidine (5.6 g.) and 3-bromopropylphthalimide (13.4 g.) in ethanol (100 ml.) containing sodium (1.15 g.) was heated under reflux for 20 hours to give 2-(3-phthalimidopropylthio)pyrimidine, m.p. 81.5°-82.5° (from ethanol-water). Reaction of the phthalimido compound (3.7 g.) and hydrazine (1.86 g.) followed by reaction of the product directly with N-cyano-N',S-dimethylisothiourea by the procedure of Example 3(a) gives N-cyano-N'-methyl-N"-[3-(2-pyrimidylthio)propyl]guanidine.

1. temperaturewas heated
2. temperatureunder reflux for 20 hours