Cobalt (II) catalyzed oxidation of aldehydes to carboxylic acid with molecular oxygen

Article abstract of DOI:10.1016/S0040-4039(00)74789-7

A variety of aromatic and some aliphatic aldehydes are efficiently transformed to the corresponding carboxylic acid in presence of catalytic amount of Cobalt (II) chloride, molecular oxygen and acetic anhydride at room temperature. Phenolic aldehydes undergo acylative oxidation to give the corresponding acylated carboxylic acid.