Etude de la réactivité (régiosélectivité et/ou stéréosélectivité) d'un acide dithiophosphorique sur des alcynes soufrés

Abstract : The reactivity of O,O'-dialkyldithiophosphoric acid towards alkynes is describeb in this papaer. The aim was to obtain phosphosulfurated alkenes and to avoid double addition. Different alkynes have been synthetised : monosubstituted, disubstituted, sulfurated and sulfonated. The influence of sulfur according to its position in comparison with triple bonds, is shown clearly. The cese of allenes is approached also. The selectivity of the reaction is studied according to different methods : variation of solvents and catalysts. It's possible to orient the addition regioselectivity to obtain either of isomere. On the other hand, the monosusbtituted alkynes are more reactive than substituted alkynes for this reaction. These new products have been identified with 1H, 13C and 31P NMR, and with GC/MS. We note that with this last method, the products decompose to give thioaldehydes, thioketones and dithioesters
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Valérie Carnot-Dodin. Etude de la réactivité (régiosélectivité et/ou stéréosélectivité) d'un acide dithiophosphorique sur des alcynes soufrés. Autre. Université Paul Verlaine - Metz, 1994. Français. ⟨NNT : 1994METZ059S⟩. ⟨tel-01776866⟩

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