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 enereaction of sulfurdioxide 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 sulfurdioxide to 1-oxy-
Polyfunctional sulfonamides and sulfonates and process for preparing them
申请人:Ecole Polytechnique Fédérale de Lausanne
公开号:EP1447397A1
公开(公告)日:2004-08-18
The present invention relates to a process for preparing sulfonyl halides comprising the steps of a) reacting an enoxymetal, allylsilane or allylstannane compound, preferably in the presence of a diene, with sulphur dioxide and b) adding a suitable halogen source to the metal sulfinate intermediate of step a). Furthermore, the present invention relates to new sulfonyl chlorides, bromides, and iodides, sulfonamides and sulfonates. In addition, the present invention teaches the use of the new multifunctional sulfonamides and sulfonates for the preparation of a medicament, bacteriocides, fungicides, pesticides, and herbicides as well as the use of sulfonyl chlorides for the preparation of sulfonamides and sulfonates.
Chemistry of β-oxoalkanesulfonic acids as CH-acids
作者:T. P. Efimova、E. S. Lipina、N. V. Kuz’mina
DOI:10.1134/s107036321412007x
日期:2014.12
Ability of beta-oxoalkanesulfonic acids and their esters to enter into the reactions characteristic for CH-acids (azocoupling, nitrosation, aldol condensation, Michael reaction) was demonstrated. New poly-functional aliphatic sulfonic acids were synthesized as a result of these reactions.