Gold- or Platinum-Catalyzed Synthesis of Sulfur Heterocycles: Access to Sulfur Ylides without Using Sacrificial Functionality
作者:Paul W. Davies、Sébastien J.-C. Albrecht
DOI:10.1002/anie.200904309
日期:2009.10.19
It′s no sacrifice: Alkynes have been used as direct precursors to sulfur ylides under gold or platinum π‐acid catalysis in an atom‐economic manner. An intramolecular redox reaction between an alkyne group with a tethered sulfoxide unit generates a sulfur ylide, which undergoes 2,3‐sigmatropicrearrangement. Acyclic substrates are cycloisomerized to afford functionalized dihydrothiophenones (see scheme)