Summary
Piperidine may be rapidly converted into pyridine using palladium(II) Chloride or tetrachloropalladate(II) ion in aqueous medium at pH 10-11 and in the absence of oxygen. Cyclohexanone may be aromatized under the same conditions, although more slowly. The products fromo-cyclohexenylcyclohexanone are also described.
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Gillard, R.D., Lyons, J.R. Palladium (II) chloride as a reagent for the mild aromatization of piperidine and cyclohexanone. Transition Met Chem 2, 19–21 (1977). https://doi.org/10.1007/BF01402670
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DOI: https://doi.org/10.1007/BF01402670