Sulfur Dioxide Mediated One-Pot, Three- and Four-Component Syntheses of Polyfunctional Sulfonamides and Sulfonic Esters: Study of the Stereoselectivity of the Ene Reaction of Sulfur Dioxide
作者:Laure C. Bouchez、Srinivas Reddy Dubbaka、Māris Turks、Pierre Vogel
DOI:10.1021/jo049047j
日期:2004.9.1
The ene reaction of sulfur dioxide with enoxysilanes or with allylsilanes generates silyl sulfinates that can be brominated (Br2 or NBS) or chlorinated (NCS or Cl2) to produce the corresponding sulfonyl halides. They react with primary and secondary amines or alcohols to give the corresponding sulfonamides and sulfonic esters, respectively. The hetero-Diels−Alder addition of sulfur dioxide to 1-oxy-
二氧化硫与环氧硅烷或烯丙基硅烷的烯反应生成甲硅烷基亚磺酸盐,可将其溴化(Br 2或NBS)或氯化(NCS或Cl 2)以生产相应的磺酰卤。它们与伯胺和仲胺或醇反应,分别得到相应的磺酰胺和磺酸酯。将二氧化硫异狄尔斯-阿尔德加成到1-氧基或1,3-二氧基-1,3-二烯上会生成两性离子,该两性离子会加到环氧硅烷或烯丙基硅烷中,生成甲硅烷基亚磺酸盐,可将其原位转化为多官能磺酰胺或磺酸酯。这样可以通过一锅,三和四组分方法快速访问复杂的磺酰胺和磺酸酯库。