反应详情

A reaction mixture of 3.54 g of 6-bromo-2,2-dioxo-3-methyl-1,2-benzoxathiin-8-ylsulfonamide, 1.61 ml of 1,8-diazabicyclo[5.4.0]undec-7-ene, 2.73 g of N-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)phenylcarbamate and 35 ml of absolute dioxan is stirred for 11/2 hours at room temperature. The solvent is evaporated and the oily residue is triturated with 10 ml of 1N hydrochloric acid and 5 ml of water. The precipitate is isolated by filtration, washed with ether and dried, affording 4.84 g of N-(6-bromo-2,2-dioxo-3-methyl-1,2-benzoxathiin-8ylsulfonyl)-N'-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)urea of m.p. 196°-198° C.

1. customThe solvent is evaporated
2. customthe oily residue is triturated with 10 ml of 1N hydrochloric acid and 5 ml of water
3. customThe precipitate is isolated by filtration
4. washwashed with ether
5. customdried