Patent ID: 6355842
Filing Date: 2002-03-12
Classification: B01J,C07C,C07D

Abstract:
In a process for the oxidation of a substrate containing methylene (CH2) groups by means of oxygen oxidation in the presence of a catalyst system consisting ofa) an imide compound of the formula â€ƒin which R1 and R2 denote H, OH, halogen, a C1-C20-alkyl, alkenyl or alkoxy group, an aryl group, a C1-C6-acyl group, a carboxyl or a C1-C10-alkoxycarbonyl group, or R1 and R2 together form a double bond in formula I or form an aromatic or nonaromatic ring system in formula I or II, X denotes O or OH and n is an integer from 1 to 3, and b) a cocatalyst containing one or more elements selected from the group consisting of the transition metals and of the 2A and 3A elements of the Periodic Table, in an organic solvent to give the corresponding oxo compounds, the improvement wherein the substrate is oxidized together with an aromatic or aliphatic aldehyde having 2-20 C atoms.