... Abstract. The Lewis acid mediated reactions of enolsilanes 1–11 with benzaldehyde and isobutyraldehyde have been investigated. With the exception of compound 4, essentially no stereoselectivity is observed. References. 1; For part 26, see CH Heathcock, DL Bai, H.-P. Märki, and K. Kees, J. Org. ... Chem. Int. Ed. Engl., 23 (1984), p. 556. 6.fM.T. Reetz, K. Kesseler, and A. Jung, Tetrahedron, in press. ... Heathcock, LA Flippin; J. Am. Chem. Soc., 105 (1983), p. 1667. ...