Patent ID: 7767852

Claim:
A method for the synthesis of a phosphorus compound, comprising: reacting a phosphorus halide with an amine or an alcohol, thereby liberating an acid; wherein said phosphorus halide is a compound having at least one phosphorus-halogen (P-Hal) bond; reacting (i) said acid liberated during said synthesis and (ii) an auxiliary base to form a salt of the auxiliary base; said salt being liquid at temperatures at which the phosphorus compound is not significantly decomposed during the process of separating off the liquid salt; forming two immiscible liquid phases, a first phase comprising said salt of the auxiliary base and a second phase comprising said phosphorus compound or a solution of said phosphorus compound in a solvent; and separating said first phase from said second phase; wherein said phosphorus compound is selected from the group consisting of aminodihalophosphines, diaminohalophosphines, triaminophosphines, phosphorous ester diamides, aminophosphines, diaminophosphines, phosphorous ester amide halides, aminophosphine halides and phosphonous ester halides; wherein the base used is selected from the group consisting of compounds of the formulae (Ia) to (Ir), wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each, independently of one another, hydrogen, C 1 -C 18 -alkyl, C 2 -C 18 -alkyl which may be interrupted by one or more oxygen and/or sulfur atoms and/or one or more substituted or unsubstituted imino groups, C 6 -C 12 -aryl, C 5 -C 12 -cycloalkyl or a five- to six-membered, oxygen, nitrogen- and/or sulfur-containing heterocycle, wherein each of the abovementioned radicals may be substituted by functional groups, aryl, alkyl, aryloxy, alkyloxy, halogen, heteroatoms and/or heterocycles.