Patent ID: 6593494
Filing Date: 2003-07-15
Classification: C07C

Abstract:
A process for the oxidation of aldehydes of the formula I where R is an unbranched, branched or cyclic, unsubstituted or substituted C1-C20-alkyl radical, an aryl radical to the corresponding acids, which comprises oxidizing the aldehyde, as a substrate, to the corresponding acid in the presence of an equimolar amount, or a molar excess, of periodate, catalytic amounts of dichromate or CrO3, and in the presence of an acid selected from the group consisting of sulfuric acid, HCl, HNO3, p-toluenesulfonic acid, HBF4, H5IO6, CF3SO3H or perfluorotetradecanoic acid or mixtures thereof, in water, a water/solvent mixture or in a solvent, the solvent being selected from the group consisting of toluene, chloroform, dichloromethane, ethyl acetate, diethyl ether, methyl t-butyl ether, dimethoxyethane, 2-methoxyethyl ether, triethylene glycol dimethyl ether, dioxane, THF, acetone, isopropyl acetate and acetonitrile, at a temperature of from âˆ’20Â° C. to +50Â° C.