B(C6F5)3-Catalyzed Hydrosilation of Imines via Silyliminium Intermediates
James M. Blackwell, Eric R. Sonmor, Tiziana Scoccitti and Warren E. Piers*
Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4 Canada, Email: wpiersucalgary.ca
J. M. Blackwell, E. R. Sonmor, T. Scoccitti, W. E. Piers, Org. Lett., 2000, 2, 3921-3923.
Various benzaldimines and ketimines can be hydrosilated efficiently with PhMe2SiH employing B(C6F5)3 as a catalyst. Spectral evidence supports the intermediacy of a silyliminium cation with a hydridoborate counterion formed via abstraction of a hydride from PhMe2SiH by B(C6F5)3 in the presence of imines.
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