反应详情

7.0 g of 2-amino-4-methoxy-6-(pyridin-2-ylthiomethyl)-pyrimidine and 6.8 g of 2-methoxycarbonylphenylsulfonylisocyanate are stirred in 50 ml of abs. acetonitrile for 2 hours at 20°-25° C. The turbid solution is filtered, and the solvent evaporated off in vacuo. The residue is crystallised from dioxane to thus obtain 5.5 g (37% of theory) of N-(2-methoxycarbonylphenyl-sulfonyl)-N'-[4-methoxy-6-(pyridin-2-ylthiomethyl)-pyrimidin-2-yl]-urea, which crystallises with 0.5 mol of dioxane, m.p. 175°-181° C.

1. filtrationThe turbid solution is filtered
2. customthe solvent evaporated off in vacuo
3. customThe residue is crystallised from dioxane to thus obtain 5.5 g (37% of theory) of N-(2-methoxycarbonylphenyl-sulfonyl)-N'-[4-methoxy-6-(pyridin-2-ylthiomethyl)-pyrimidin-2-yl]-urea, which