Oxidative decarboxylation of carboxylic acids is a ''classical” procedure in synthetic organic chemistry which is well known in scope and mechanism. Surprisingly, whereas 2- hydroxycarboxylic acids have been studied in detail,] no similar investigations of 3- hydroxycarboxylic acids have appeared although these compounds are readily prepared by “aldol-type''condensation procedures.* We have now found that 3-hydroxycarboxylic acids ...