Silver-Catalyzed Rearrangement of Propargylic Sulfinates to Allenic Sulfones
作者:Michael Harmata、Chaofeng Huang
DOI:10.1002/adsc.200700447
日期:2008.5.5
Treatment of propargylicsulfinate esters with 2 mol % of silver hexafluoroantimonate results in the rapid formation of allenicsulfones in essentially quantitative yield.
Rhodium‐Catalyzed Highly Regio‐ and Enantioselective Hydrogenation of Tetrasubstituted Allenyl Sulfones: An Efficient Access to Chiral Allylic Sulfones
A highlyregio‐ and enantioselective hydrogenation of challenging tetrasubstituted allenyl sulfones has been developed, affording chiral allylic sulfones in good yields with excellent regio‐ and enantioselectivities (up to 99 % yield and 99 % ee). This method provides an efficient and concise route to chiral allylic sulfones, thus offering an atom‐economic process with a wide range of potential applications
Synthesis of thiophenes from allenyl sulfones involving α,β-unsaturated sulfines as intermediates
作者:Johannes B. van der Linden、Peter F. T. M. van Asten、Samuel Braverman、Binne Zwanenburg
DOI:10.1002/recl.19951140203
日期:——
The synthesis of thiophenes starting fromallenylsulfones, via intermediate formation of α,β-unsaturatedsulfines, is described. The allenylsulfones were synthesized by a [2,3]-sigmatropic rearrangement of appropriately substituted prop-2-ynyl sulfinates. Treatment of the allenylsulfones with n-butyllithium and chlorotrimethylsilane gave α-silylated allenylsulfones in almost quantitative yield
Studies on the addition of allyl oxides to sulfonylallenes. Preparation of highly substituted allyl vinyl ethers for carbanionic Claisen rearrangements
作者:Scott E. Denmark、Michael A. Harmata、Kathleen S. White
DOI:10.1021/jo00227a017
日期:1987.9
[2,3] Sigmatropic Rearrangement of Propargylic Sulfinates by a Pale Ag<sup>1</sup>-USY Zeolite and Silver Salts
作者:Carissa S. Hampton、Michael Harmata
DOI:10.1002/adsc.201400978
日期:2015.2.9
AbstractThe sigmatropic rearrangement of propargylic sulfinates to allenic sulfones is catalyzed by the silver cation. The Ag1‐USY zeolite, as well as non‐coordinating silver salts, lead to essentially quantitative yields of the corresponding allenic sulfones.magnified image