Process for the preparation of carboxylic acid esters of hydroxy sulfonates.

摘要

A process for the preparation of carboxylic acid esters of hydroxy sulfonates, characterized in that an olefinically unsaturated compound is carbonylated with carbon monoxide in the presence of an aromatic hydrocarbon reaction medium, a hydroxy sulfonate of the general formula (1) HO-R-SO3M, wherein R represents a divalent optionally substituted hydrocarbon group and M represents a metal of Group I and II of the Periodic Table of the Elements, a palladium catalyst, at least 5 mol of a phosphine of the general formula (II) PR<1>R<2>R<3>, wherein R<1>, R<2> and R<3> each represent an optionally substituted aryl group, per gram atom of palladium and as promotor an acid having a pKa < 2 except hydrohalogenic and carboxylic acids.