1. Gray, R. W., Chapleo, C. B., Vergnani, T., Dreiding, A. S., Liesner, M., and Seebach, D.: Helv. Chim. Acta 58, 2524 (1975) and ref. cited
2. Nucleophilic substitutions at vinylic carbon atoms usually proceed with retention of configuration. See, for example: G. Modena, Acc. Chem. Res. 4, 73 (1971). Rationales have been proposed by: W. D. Stohrer, Tetrahedron Lett., 207 (1975); S. I. Miller, Tetrahedron 33, 1211 (1977)
3. Massé, J.: Thèse de Doctorat, Montpellier 1969; Corriu, R. and Massé, J.: Chem. Comm., 1373 (1968), J. Organomet. Chem. 35, 51 (1972)
4. Minot, C.: Thèse de Doctorat, Orsay 1977, NguyÊn, Trong Anh and Minot, C., J. Amer. Chem. Soc., in press
5. Salem, L.: Chem. in Britain 5, 449 (1969). See also: Fukui, K.: Bull. Chem. Soc. Japan 38, 1749 (1965); Pearson, R. G.: Chem. Eng. News 48, 66 (1970)