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Ruthenium Tetraoxide Oxidation of Alkenes.Part 7. A More Complete Picture.-The main oxidation products of a number of linear and cyclic alkenes are 1,2-diols and/or α-ketols sometimes accompanied by small amounts of scission products such as aldehydes and/or ketones which can be further oxidized to carboxylic acids or can react with the diols to form cyclic acetals, e.g. (XVIII). All reactions proceed through a common intermediate ruthenium(VI) diester, which is presumably the first-formed product from a (3 + 2) cycloaddition of RuO4 to the olefin. -(ALBARELLA, L.; PICCIALLI, V.; SMALDONE, D.; SICA, D.; J.

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