反应详情

A solution of 2-methylsulfonylbenzenesulfonylisocyanate (2.1 g, 8.0 mmol) in dry methylene chloride (12 ml) was added to 2-methylamino-4,6-dimethoxy-1,3,5-triazine (1.0 g, 6.0 mmol) and a catalytic amount of 1,4-diaza[2.2.2]bicyclooctane. The mixture was stirred at room temperature overnight. The solvent was removed in-vacuo and 1-chlorobutane was added to the residue. The precipitated solid was filtered and dried to give N-[(4,6-dimethoxy-1,3,5-triazin-2-yl)(methyl)aminocarbonyl]-2-(methylsulfonyl)benzenesulfonamide (2.3 g) as a white powder, m.p. 160°-162.5°. The product showed characteristic singlets in the NMR at δ3.25 (NCH3), 3.40 (SO2CH3) and 4.0 (OCH3), and showed infrared absorption peaks at 1690, 1550, 1420, 1340, 1310 and 1150 cm-1.

1. customThe solvent was removed in-vacuo and 1-chlorobutane
2. additionwas added to the residue
3. filtrationThe precipitated solid was filtered
4. customdried