Abstract
Treatment of ethyl
(3-bromopropyl)phosphonochloridate with benzylmagnesium chloride gave ethyl (benzyl)(3-bromopropyl)phosphinate.
This underwent free-radical bromination to give ethyl
(a-bromobenzyl)(3-bromopropyl)phosphinate Cyclization with aqueous ammonia gave
3-ethoxy- 2-phenyl-1,3-azaphosphininane 3-oxide. Attempts to prepare the
2-(pyridin-3'-yl)-substituted 1,3-azaphosphininane are also discussed.
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