Process for preparing acylphosphines and derivatives

Details Process for preparing acylphosphines and derivatives Process for preparing acylphosphines and derivatives

C - Chemistry, Metallurgy

07

F

C07F 9/50 (2006.01) C07F 9/53 (2006.01)

Patent

CA 2349637

A description is given of processes for the preparation of mono- and bisacylphosphines and of mono- and bisacylphosphine oxides and mono- and bisacylphosphine sulfides, which comprises first reacting organic P-monohalogenophosphines or P,P-dihalogenophosphines, or mixtures thereof, with an alkali metal or magnesium in combination with lithium, where appropriate in the presence of a catalyst, and then carrying out the reaction with acid halides and, in the case of the process for the preparation of oxides, carrying out an oxidation step and, in the case of the preparation of sulfides, reacting the phosphines so obtained with sulfur. It is characteristic, inter alia, that the processes are carried out without isolation of the intermediates.

Les procédés de l'invention visent à l'élaboration d'oxydes et de sulfures de mono- et bisacylphosphines. On commence par prendre des P-monohalogénophosphines ou des P,P-dihalogénophosphines organiques ou certains de leurs mélanges, et à les faire réagir avec un métal alcalin ou du magnésium en combinaison avec du lithium, le cas échéant en présence d'un catalyseur. On procède alors à une réaction avec des halogénures acides. Pour l'élaboration des oxydes, on exécute ensuite une oxydation, et pour l'élaboration des sulfures, on fait réagir les phosphines ainsi obtenues avec du soufre. La caractéristique principale du procédé est d'éviter d'avoir à isoler les intermédiaires.

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