Preparation of halo enol phostones by reaction of acetylenic phosphonate monoesters with (bis-collidine) halo hexafluorophosphate

V André, S Robin, G Rousseau

Index: Andre, Virginie; Robin, Sylvie; Rousseau, Gerard Tetrahedron Letters, 2008 , vol. 49, # 34 p. 5059 - 5062

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Citation Number: 7

Abstract

Reaction of non-conjugated acetylenic phosphonate monoesters with (bis-collidine) bromo and iodo hexafluorophosphates was found to lead to the formation of halo enol phostones. Depending on the size of the heterocyclic compounds formed (6–8-membered compounds), endo or a mixture of endo and exo cyclization products were obtained.