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.
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:——
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)