A method for the production of momo - carboxy dialkylphosphinic acids, - esters and - salts by means of vinylene / nitriles and their use

摘要

The present invention relates to a process for the preparation of mono - carboxy dialkylphosphinic acids, - esters and - salts by means of vinylene / nitriles, characterized in that onea) a phosphine acid source (i) with olefins (iv) in the presence of a catalyst a to a alkylphosphonous, the salt or ester (ii) umesetzt,b) the resulting alkylphosphonous, the salt or ester (ii) with acetylenic compounds of the formula (v) in the presence of a catalyst b to a mono - functionalized dialkyl phosphine acid derivative (vi) andc), which has been formed in such a mono - a functionalized dialkyl phosphine acid derivative (vi) with a hydrogen cyanide in the presence of a catalyst c. to give the monofunctionalized dialkyl phosphine acid derivative (vii) andd), which has been formed in such a mono - functionality, by way of a dialkyl phosphine acid derivative (vii) in the presence of a catalyst d to the mono - carboxy dialkyl phosphine acid derivative (iii) , in which r¹, R², R³, R⁴, R⁵, R⁶ are the same or different and independently, inter alia, h, c₁-C.₁₈-Alkyl, c.sub.2₆-C.₁₈-Aryl, c₆-C.₁₈-Aralkyl, c.₆-C.₁₈-Alkylaryl and x and y are the same or different and independently of one another, h, c₁-C.₁₈-Alkyl, c.sub.2₆-C.₁₈-Aryl, c₆-C.₁₈-Aralkyl, c.₆-C.₁₈-Alkylaryl, mg, ca, al, sb, sn, ge, ti, fe, zr, zn, ce, bi, sr, mn, cu, ni, li, na, k and / or a protonated nitrogen base, and the catalysts a, b and c around ..