Abstract

Silicate intercalated cobalt chromium hydrotalcite (CoCr–HTSi) was prepared for the first time by a simple sol–gel method. The resultant CoCr–HTSi yielded remarkable activity for allylic oxidation of cyclohexene and aromatic alcohols in the presence of environmentally-friendly conditions, viz., H2O2 as oxidant and methanol as oxidant. More importantly, the active species remain intact on the surface and no leaching occurred under the reaction conditions. The catalysts are recyclable even after four cycles, and have shown to be as truly heterogeneous in nature.

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