Unusual reaction of 2-trimethylsilylethylidenetriarylphosphoranes (seyferth-wittig reagent) with α-methylaldehydes: a novel method for highly cram-diastereoselective addition of vinyl anion equivalent

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Abstract By the reaction of α-methylaldehydes with trimethylsilylethylidenetriarylphosphoranes the introduction of vinyl group is effected in highly Cram-selective manner.

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