Synthesis and NMR (Nuclear Magnetic Resonance) Characterization of P-Vinyl Substituted Phosphazene Precursors

摘要

The reactions of either PhPC12 or PC13 with (Me3Si)2 NLi followed by H2C=CHMgBr were used to prepare the new P-vinyl substituted bis((trimethylsilyl)amino)phosphines. A relatively new class of inorganic polymers, the poly (alkyl/arylphosphazenes) in which all of the substituents are attached via P-C bonds, are readily prepared by condensation reactions of appropriate Si-N-P precursors. More recent efforts have been aimed at expanding the overall scope of this polymerization method by three general approaches. This study is related to the third derivatization method which involves introduction of the desired substituents at the phosphine stage (A). In particular, we report here the synthesis and detailed NMR characterization of a series of new (silylamino) phosphines (A) and N-silylphosphoramines (B) which contain vinyl groups on phosphorus. Such compounds are of interest for the eventual preparation of poly (alkyl/arylphosphazenes) bearing P-vinyl groups for the purpose of controlled crosslinking of the polymer chains as will be reported elsewhere. Reprints. (aw)