Etard Reaction
Preparation of Benzaldehyde from Toluene
Side chain oxidation of toluene and its derivatives by strong oxidising agents such as KMnO4 gives benzoic acid. When chromyl chloride is used as an oxidising agent, toluene gives benzaldehyde. This reaction is called Etard reaction. Acetic anhydride and CrO3 can also be used for this reaction.
