1. Among the many methods and strategies are the following: Renaud, P.; Lacote, E.; Quaranta, L. Tetrahedron Lett. 1998, 39, 2123. Crich, D.; Sun, S. J. Org. Chem. 1996, 61, 7200. Curran, D. P.; Chang, C. T. J. Org. Chem. 1989, 54, 3140. Barton, D. H. R.; Motherwell, W. B.; Stange, A. Synthesis 1981, 743. Berge, J. M.; Roberts, S. M. Synthesis 1979, 471. Leibner, J. E.; Jacobus, J. J. Org. Chem. 1979, 44, 449. Corey, E. J.; Suggs, J. W. J. Org. Chem. 1975, 40, 2554.
2. Lampard, C.; Murphy, J. A.; Lewis, N. J. Chem. Soc., Chem. Commun. 1993, 295.
3. Callaghan, O.; Lampard, C.; Kennedy, A. R.; Murphy, J. A. J. Chem. Soc., Perkin Trans. 1 1999, 995.
4. Bard, A. J.; Ledwith, A.; Shine, H. J. Adv. Phys. Org. Chem. 1976, 13, 229.
5. Shine, H. J. In The Chemistry of the Sulfonium Group; Stirling, C. J. M.; Patai, S., Eds.; Wiley: New York, 1981; pp. 523–570.