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Keywords:

  • Aldehydes;
  • Lactones;
  • Michael addition;
  • Palladium;
  • Rearrangement

Abstract

Stereoselective preparation of α-silylated α-quaternary unsaturated aldehydes 2 from variously substituted silylated vinyloxiranes is achieved with the aid of palladium(0) catalysis under smooth experimental conditions. One example of a versatile application of this rearrangement reaction, in the case of the tert-butyldimethyl(3-vinyloxiran-2-yl)silane derivative 1a, has resulted in one-pot diastereoselective syntheses of the highly functionalized polysubstituted δ-lactones 3339, the reactivity of which has been studied.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)