Manganese Dioxide Supported on Aluminum Silicate: A New Reagent for Oxidation of Alcohols Under Heterogeneous Conditions

Manganese dioxide supported on aluminum silicate, under heterogeneous conditions at reflux, selectively oxidized aromatic primary and secondary alcohols into the corresponding aldehydes and ketones, respectively, in yields of 87–96%. The present method failed to oxidize aliphatic alcohols. Keywords: Alcoholsaluminum silicatemanganese dioxideoxidationsupported reagent Notes a All the substrates are commercially available. b All the products are known compounds and were identified by comparison of their melting points with the literature values as well as by 1H NMR and IR. c Yield of isolated pure product. d 2,4-Dinitrophenylhydrazone derivative. e Mp of benzophenone.