反应详情

3.42 g of 6-amino-4-methyl-3-methylthio-1,2,4-triazin-5-one are suspended in 100 ml of absolute dioxane, and 4.99 g of 2-methoxycarbonylphenylsulfonyl isocyanate are added at room temperature. The reaction proceeds slightly exothermically. After a reaction time of one hour at room temperature, the reaction has ended. The precipitate which has separated out is filtered off and washed with a small amount of dioxane. After drying, 6.0 g of 6-[3-(2-methoxycarbonylphenylsulfonyl)-ureido]-4-methyl-3-methylthio-1,2,4-triazin-5-one with a melting point of 186°-187° C. are thus obtained.

1. customAfter a reaction time of one hour
2. customat room temperature
3. customThe precipitate which has separated out
4. filtrationis filtered off
5. washwashed with a small amount of dioxane
6. customAfter drying