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The application of CCl4, C6H12, EtOAc, and Me2CO as solvents for biphasic systems has been compared for oxidative cleavage of alkenes and alkynes by RuO4 to carboxylic acids, using the RuCl3 · nH2O–IO(OH)5 reagent for which an improved procedure is described. Cyclohexane is an effective and economic replacement for the environmentally unfriendly CCl4; acetone and ethyl acetate are less effective.
We thank Johnson, Matthey for loans of hydrated ruthenium trichloride.
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