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■ Reaction of Lawesson’s Reagent with γ-Phosphonyloximes: Synthesis of Novel 1,2,5-Oxazaphospholine Derivatives

Aymen Wahbi and Soufiane Touil*

*Department of Chemistry, Faculty of Sciences of Bizerta, 7021-Jarzouna, Tunisia

Abstract

The reaction of γ-phosphonyloximes with Lawesson’s reagent leads to a variety of new 1,2,5-oxazaphospholine derivatives. The reaction shows complete regioselectivity and gives a mixture of two diastereoisomers. The steric factors influencing the regioselectivity of the reaction are discussed and a mechanism accounting for the formation of the new compounds is proposed.