Carboxyphenyl-alkylphosphinic acids and the esters thereof corresponding to the formula I ##STR1## 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.
Carboxyphenyl-alkylphosphinic酸及其对应的酯,其
化学式为I,其中R1是具有1至4个碳原子的烷基,R2和R3各自独立地是氢,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。该化合物的制备方法。