H.L riley et al., J. Chem. Soc.1932,1875
Oxidation of active Methylene groups to carbonyl compounds
Selenium Dioxide (Riley Oxidation)
          White crystalline solid, mp 340°C, very poisonous
          Selenium metal is the by-product
          Solvents = dioxane, HOAc/Ac2O, H2O

         

Someone please pm me on how to make the image available.

VL_

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you just needed to remove :

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John Lennon - Working Class Hero[/hr]