Hydroxy-sulphonate carboxylic ester prodn.

摘要

Prodn. of carboxylic esters (A) of hydroxy sulphonates comprises carbonylation of an olefinic cpd. with CO in presence of aromatic hydrocarbon reaction medium; a cpd. of HO-R-SO3M (I); a Pd catalyst; at least 5 moles PR1R2R3 per g-atom Pd, and as promoter an acid of pKa below 2 (excluding hydrohalic and carboxylic acids). (R = opt. substd. divalent hydrocarbyl; M = Gp. 1 or 2 metal; R1, R2 and R3 = opt. substd. aryl).