反应详情

349 mg of a 40% methylamine methanol solution was dropwise added to a mixture consisting of 1 g N-(2-chloro-5-thiazolylmethyl)-S-methyl-N'-nitroisothiourea and 30 ml acetonitrile, at room temperature, over 5 minutes. After stirring for 1.5 hours, the resultant white precipitate was collected by filtration and then dried to afford 410 mg of N-(2-chloro-5-thiazolylmethyl)-N'-methyl-N"-nitroguanidine (compound No.14) as a white powder. The mother liquor after the filtration was concentrated, then 20 ml of ethanol was added, followed by stirring thoroughly, and the crystals formed were collected by filtration to obtain additional 330 mg of compound No.14 (mp 172-173° C.). Upon recrystallization from acetonitrile, this product exhibited mp 173-174° C.

1. filtrationthe resultant white precipitate was collected by filtration
2. customdried