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

被引:45
|
作者
Bouchez, LC [1 ]
Dubbaka, SR [1 ]
Turks, M [1 ]
Vogel, P [1 ]
机构
[1] Swiss Fed Inst Technol, Inst Chem Sci & Engn, BCH, CH-1015 Lausanne, Switzerland
来源
JOURNAL OF ORGANIC CHEMISTRY | 2004年 / 69卷 / 19期
关键词
D O I
10.1021/jo049047j
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The ene reaction of sulfur dioxide with enoxysilanes or with allylsilanes generates silyl sulfinates that can be brominated (Br-2 or NBS) or chlorinated (NCS or Cl-2) 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- or 1,3-dioxy-1,3-dienes generates zwitterions that add to enoxysilanes or allylsilanes giving silyl sulfinates that can be converted in situ into polyfunctional sulfonamides or sulfonic esters. This realizes quick access to libraries of complicated sulfonamides and sulfonic esters applying one-pot, three- and four-component methods.
引用
收藏
页码:6413 / 6418
页数:6
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