Carboxyphenyl-alkylphosphinic acids and the esters thereof corresponding to the formula I ##SPC1## where R.sub.1 is alkyl having from 1 to 4 carbon atoms, R.sub.2 and R.sub.3, independently, each are hydrogen, alkyl having from 1 to 12 carbon atoms, or oxyalkyl HO--(CH.sub.2).sub.n --CHR--, n being 1 to 3 and R hydrogen or alkyl having from 1 to 4 carbon atoms, and a process for the preparation of these compounds.
羧基苯基-烷基
膦酸及其酯,其对应于式I
其中R1是具有1至4个碳原子的烷基,R2和R3分别独立地为氢,具有1至12个碳原子的烷基或氧烷基HO-(
CH2)n-CHR,其中n为1至3,R为氢或具有1至4个碳原子的烷基,以及制备这些化合物的过程。