Activation catalytique des réactifs de grignard par des complexes du nickel en série organosiliciée : I. Réactions de substitution avec les réactifs de grignard non réducteurs |
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Authors: | RJP Corriu JPR Massé B Meunier |
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Institution: | Laboratoire Associé au C.N.R.S. No. 82, Laboratoire des Organométalliques, Université des Sciences et Techniques du Languedoc, 34060-Montpellier-Cedex France |
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Abstract: | A new method of Si-C bond formation is described which involves coupling reactions between non-reducting Grignard reagents and Si-H bonds catalyzed by NiII complexes. The steric environment of the silicon atom has little effect on the reaction.Cobalt complexes are moderate catalysts, and those of iron, copper, zirconium and titanium are inactive.The reactions proceed with retention of configuration at the silicon atom. This use of Grignard reagents avoids the awkward preparations of unsaturated lithium or sodium analogues (allyl, crotyl, benzyl, vinyl). |
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