申请人:Occidental Chemical Corporation
公开号:US04922012A1
公开(公告)日:1990-05-01
Novel organic tertiary phosphine oxides for example, bidentate organophosphorus actinide extractants, such as the carbamoylmethylphosphine oxides (CMPO's) are disclosed, such compounds can be prepared (e.g., in 85% or better yield and purity) by a process involving phase transfer catalysis, under conditions where degradive hydrolysis of the products or reactants is substantially avoided. For example, tertiary carbamoylmethylphosphine oxides which are useful as extractants for transplutonium elements are disclosed and can be prepared by reaction of the corresponding secondary phosphine oxides with 2-substituted acetamides (wherever the substituent is a good leaving group, e.g., chlorine) in a two-phase system containing a high concentration of an aqueous base (preferably sodium hydroxide) and a suitable phase transfer catalyst, e.g., tetralkylammonium chlorides.
本发明揭示了一种新型有机三次膦氧化物,例如双齿有机磷酸铀萃取剂,如卡巴莫基甲基膦氧化物(CMPO's)。这些化合物可以通过相转移催化的过程制备(例如,产率和纯度可达85%或更高),在这种过程中,可以避免产品或反应物的降解水解。例如,本发明揭示了对于超铀元素有用的三次卡巴莫基甲基膦氧化物,并且可以通过在含有高浓度水性碱(优选为氢氧化钠)和适当的相转移催化剂(例如四烷基铵盐)的两相系统中,将相应的二次膦氧化物与2-取代乙酰胺(无论取代基是好的离去基,例如氯)反应而制备得到。