Process for the preparation of acetoamide derivatives, acetothioamides and acetoselenoamides, in particular carbamoylmethylphosphine and carbamoylmethylphosphine derivatives thus obtained.

摘要

The invention relates to a process for the preparation of acetoamide derivatives, which comprises reacting an anion derived from acetoamide, for example with the formula: BR/ (CF DRAWING IN BOPI) BR/ BR in which Z is 0, S or Se and R1, R2, R3 and R4 are hydrogen atoms or hydrocarbon groups, optionally substituted, with a phosphine halide, arsine or stibine, for example a halide of formula: BR/ (CF DRAWING IN BOPI) BR/ BR/ where Y is P, As or Sb. BR/ There is thus obtained a derivative of formula: BR/ (CF DRAWING IN BOPI) BR/ BR/ which can be used for the extraction of lanthanides and actinides from acidic solutions.