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)
Rhodium carbenoid mediated cyclisations. Synthesis and rearrangement of cyclic sulphonium ylides
作者:Christopher J. Moody、Roger J. Taylor
DOI:10.1016/s0040-4039(00)82252-2
日期:1988.1
Treatment of diazo sulphides with rhodium (II) acetate in benzenegives six- and seven-membered cyclic sulphoniumylides; although the S-benzyl and S-ethyl ylides can be isolated, they rearrange, or eliminate ethylene respectively, on heating; the S-allyl ylides cannot be isolated since they undergo spontaneous [2,3]-sigmatropic rearrangement.
MOODY, CHRISTOPHER J.;TAYLOR, ROGER J., TETRAHEDRON LETT., 29,(1988) N 46, C. 6005-6008
作者:MOODY, CHRISTOPHER J.、TAYLOR, ROGER J.
DOI:——
日期:——
Rhodium carbenoid mediated cyclisations. Part 5. Synthesis and rearrangement of cyclic sulphonium ylides preparation of 6- and 7-membered sulphur heterocycles
作者:Christopher J. Moody、Roger J. Taylor
DOI:10.1016/s0040-4020(01)96017-x
日期:1990.1
Treatment of diazo mercaptans with rhodium(ll) acetate gives six- and seven-membered sulphur heterocycles; diazo sulphides give cyclic sulphoniumylides, which are isolable, or rearrange, depending on the nature of the substituent on sulphur.