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-
Palladium-catalyzed desulfinylative Negishi C–C bond forming cross-couplings of sulfonyl and organozinc chlorides
作者:Srinivas Reddy Dubbaka、Pierre Vogel
DOI:10.1016/j.tetlet.2006.03.101
日期:2006.5
Arene-, phenylmethane- and alkenesulfonyl chlorides are suitable electrophilic reagents in desulfinylative carbon–carbon bond formation cross-coupling reactions with organozinc reagents.
BCl<sub>3</sub>-Mediated Ene Reaction of Sulfur Dioxide and Unfunctionalized Alkenes
作者:Dean Marković、Chandra M. R. Volla、Pierre Vogel、Adrián Varela-Álvarez、José A. Sordo
DOI:10.1002/chem.201000164
日期:2010.5.25
of BCl3, the unstable sulfinicacid form stable sulfinicacid⋅BCl3 complexes that can be reacted in situ with NCS to generate corresponding sulfonyl chlorides, or with a base to generate corresponding sulfinates. The latter can be reacted with electrophiles to generate sulfones, or with silyl chloride to form β,γ‐unsaturated silyl sulfinates. The sulfinicacid⋅BCl3 complexes can be reacted with ethers
An efficient asymmetric synthesis of substituted p-alkoxycarbonyl sulfonates is described. Enantiopure α-substituted P-alkoxycarbonyl sulfonates can be obtained via u-alkylation of metalated sulfonates bearing 1,2:5,6-di-O-isopropylidene-u-D-allofuranose as the chiral auxiliary with alkyl bromoacetates. α,β-Di-substituted P-alkoxycarbonyl sulfonates were prepared starting from the corresponding enantiopure