期刊
REACTION KINETICS AND CATALYSIS LETTERS
卷 88, 期 2, 页码 339-348出版社
AKADEMIAI KIADO
DOI: 10.1007/s11144-006-0070-y
关键词
alcohols; oxidation; hydrogen peroxide; homogeneous catalysis; manganese complexes
The dinuclear manganese(IV) complex [LMn(O)(3)MnL](PF6)(2) (1, L = 1,4,7-trimethyl-1,4,7-triazacyclononane) catalyzes the extremely efficient oxidation of alcohols with hydrogen peroxide at room temperature. Oxalic acid is an obligatory co-catalyst. The oxidation of isopropanol, for example, yields acetone with turnover numbers up to 40000 after 5-10 h in the absence of a solvent. 2-Cyanoethanol was oxidized by this system with somewhat lower efficiency (conversion 70%). The catalytically active cation from salt 1 was obtained in an insoluble form containing a heteropoly anion [Mn2O3(TMTACN)(2)](2)[SiW12O40]. Oxidation of 2-cyanoethanol using this heterogenizedcatalyst and oxalic acid gave the oxo-products with the 54% total yield.
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