Historic Overview Etard
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The Étard reaction is a chemical reaction that involves the direct oxidation of an aromatic or heterocyclic bound methyl group to an aldehyde using chromyl chloride. For example, toluene can be oxidized to benzaldehyde.
It is named for the French chemist Alexandre Léon Étard (5 January 1852, Alençon – 1 May 1910).