2007

Multi-membered O,S-heterocyclesR 0691 Hydrotalcites as Catalysts for the Baeyer—Villiger Oxidation of Cyclic Ketones

with Hydrogen Peroxide/Benzonitrile. — Three hydrotalcites with variable Mg/Al ratios act as catalysts for the title reaction of cyclohexanone under mild conditions. The catalytic activity increases with increasing magnesium content. The presence of ben-zonitrile is essential for the oxidation reaction. Substoichiometric amounts of a surfac-tant improve the conversion and the catalytic activity while preserving 100% selectiv-ity. The best catalyst among those studied is also effective in the oxidation of other cyclic ketones with excellent conversion results. — (RUIZ*, J. R.; JIMENEZ-SANCHIDRIAN, C.; LLAMAS, R.; Tetrahedron 62 (2006) 50, 11697-11703; Dep. Quim. Org., Fac. Cienc., Univ. Cordoba, E-14004 Cordoba, Spain; Eng.) — Klein

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