Three-component reaction of the zwitterion generated from dialkyl acetylenedicarboxylate and an alkyl or aryl isocyanide with an alkyl or aryl sulfonamide is described. The reaction afforded the corresponding special type of ketenimine sulfonamide derivatives in water without using any activation and modification. The products could be easily hydrolyzed to the corresponding sulfonamide-butanamide derivatives at 80 °C in good yields without using a catalyst.
描述了一种由二烷基
乙炔二
羧酸酯与烷基或芳基
异氰酸酯反应生成的两性离子,与烷基或芳基磺酰胺进行的三组分反应。该反应在
水中进行,无需任何激活和修饰,就能获得相应的特殊类型的烯
亚胺磺酰胺衍
生物。所得产物可在80°C下容易
水解为相应的磺酰胺-丁酰胺衍
生物,且不需要催化剂,产率良好。