Phenylphosphonic acid derivative and production process therefor

摘要

There are provided a dialkyl dialkoxycarbonylphenylphosphonate which is useful as a resin modifier, a process for producing the same in high yield at a low cost, and a process for producing a dicarboxyphenylphosphonic acid in high yield at a low cost. The production process comprises producing a dialkyl dialkoxycarbonylphenylphosphonate obtained by heating and reacting a dialkoxycarbonylphenyl halide with a trialkyl phosphite in the presence of a catalyst comprising an element of group VIII of the periodic table (such as an alumina supported palladium catalyst) and hydrolyzing the obtained dialkyl dialkoxycarbonylphenylphosphonate in the presence of an acid or base to produce a dicarboxyphenylphosphonic acid.