Abstract
Three-component reactions with aldehydes, trimethylsilyl trifluoro- methanesulfonate or iodide. and triphenylphosphine (TPP) yield the title compounds. The X-ray structure of the cationic part of a representative product, the (4-methylphenyl)[(trimethylsiloxy) methyl]TPP + , shows an interesting lengthening of the P + -C(α) bond compared with reported values for methyl(TPP) + and benzyl(TPP) + cations (C(α) represents the P-bonded carbon atom of the various alkyl groups). The behavior of the title compounds towards charged nucleophilic reagents and a powerful electrophile (trifluoromethanesulfonic anhydride) is similar to that of analogous pyridinium salts
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