Étard reaction

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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.[1][2][3] It is named for the French chemist Alexandre Léon Étard (5 January 1852, Alençon – 1 May 1910). For example, toluene can be oxidised to benzaldehyde:

The Etard reaction

Other oxidation reagents like potassium permanganate or potassium dichromate oxidize to the more stable carboxylic acids.

[edit] References

  1. ^ Étard, A. (1880). "Sur la synthèse des aldéhydes aromatiques; essence de cumin" ([dead link] – Scholar search). Compt. Rend. 90: 534. 
  2. ^ Étard, A. (1881). "Recherches sur le rôle oxydant de l'acide chlorochromique" ([dead link] – Scholar search). Ann. Chim. Phys. 22: 218–286. 
  3. ^ Hartford, W. H.; Darrin, M. (1958). "The Chemistry Of Chromyl Compounds". Chem. Rev. 58: 1–61. doi:10.1021/cr50019a001. 
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