The development of a direct ylide transfer to carbonyl derivatives and of a sulfoxide-mediated arylation is presented from a unified perspective. Mechanistic studies (including density functional calculations) support a common reaction pathway and showcase how subtle changes in reactant properties can lead to disparate and seemingly unrelated reaction outcomes.
Nucleophilic<i>ortho</i>-Propargylation of Aryl Sulfoxides: An Interrupted Pummerer/Allenyl Thio-Claisen Rearrangement Sequence
作者:Andrew J. Eberhart、David J. Procter
DOI:10.1002/anie.201300223
日期:2013.4.2
A new direction: The nucleophilic ortho‐propargylation of aryl sulfoxides exploits intermolecular delivery of the nucleophile to sulfur followed by an intramolecular relay to carbon (see scheme). The simple, metal‐free procedure is general, regiospecific with regard to the propargyl nucleophile, and completely selective for products of ortho‐propargylation over allenylation.
Sulfoxide-Directed Metal-Free<i>ortho</i>-Propargylation of Aromatics and Heteroaromatics
作者:Andrew J. Eberhart、Harry J. Shrives、Estela Álvarez、Amandine Carrër、Yuntong Zhang、David J. Procter
DOI:10.1002/chem.201406424
日期:2015.5.11
exploits intermolecular delivery of a propargyl nucleophile to sulfur followed by an intramolecular relay to carbon. The operationally simple cross‐coupling procedure is general, regiospecific with regard to the propargyl nucleophile, and shows complete selectivity for products of ortho‐propargylation over allenylation. The use of secondary propargyl silanes allows metal‐free ortho‐coupling to form carbon–carbon
Reduction of Sulfoxides to Sulfides Mediated by Ferrocene and Trifluoroacetic Anhydride
作者:Kenji Kobayashi、Yasuo Kubota、Naomichi Furukawa
DOI:10.1246/cl.2000.400
日期:2000.4
trifluoroacetic anhydride in the presence of ferrocene gives the corresponding sulfide. The reduction of sulfoxides composed of the ferrocene-spacer-methylsulfinyl triad system would proceed via a through-bondelectrontransfer rather than a through-space process.
Reaction of sulfoxides with nitriles in presence of trifluoracetic anhydride and trifluoroacetic acid : A case of ritter reaction on pummerer intermediate
作者:Yashwant D. Vankar、C.Trinadha Rao
DOI:10.1016/s0040-4020(01)96692-x
日期:1985.1
Reaction of various sulfoxides , with nitriles in presence of trifluoroaceticanhydride and trifluoroacetic acid gave the corresponding amides via a Ritter reaction on Pummerer intermediate derived from the sulfoxides.