| Popis: |
Vinylene-1,2 bisphosphoniums salts react, in the presence of a base, with compounds ZH having a mobile hydrogen, to give a way of synthesis of β-substituted vinylphosphoniums salts 2 or β-disubstituted alkylphosphoniums salts 3. We have studied the limits of these synthesis depending on the experimental conditions and the nature of compounds ZH (alcohols, phenols, thiols, phosphines, amines). Les sels de vinylene-1,2 bisphosphoniums reagissent, en presence d'une base, avec les composes a hydrogene mobile ZH pour fournir ainsi une methode d'obtention de sels de vinylphosphoniums β-substitues 2 ou de sels d'alkylphosphoniums β-disubstitues 3. Nous avons etudie les limites de ces syntheses en faisant varier les conditions operatoires et la nature des composes ZH (alcools, phenols, thiols, phosphines, amines). |
