Catalysis of Organic..

Nikoshvili et al . 17721. Selective Hydrogenation of Dehydrolinalool toLinalool Using Nanostructured Pd-PolymericComposite CatalystsAbstractLinda Z. Nikoshvili a , Ester M. Sulman a , Galine N. Demidenko a ,Valentina G. Matveeva a , Mikhail G. Sulman a , Lumilla M. Bronstein b ,Petr M. Valetskiy c and Irina B. Tsvetkova caDepartment of Biotechnology and Chemistry, Tver Technical University,A. Nikitina str., 22, 170026, Tver, RussiabChemistry Department, Indiana University, Bloomington, IN 47405, USAcNesmeyanov Institute of Organoelement Compounds of RAS, Vavilov str., 28,Moscow, Russiasulman@online.tver.ruCatalytic properties of the palladium nanoparticles impregnated into various syntheticpolymeric matrixes (polydiallyldimethylammonium chloride (PDADMAC), poly(ethylene oxide)-block-polyvinylpyridine (PEO-b-PVP), polystyrene-block-poly-4-vinylpyridine (PS-b-P4VP), hypercrosslinked polystyrene (HPS) etc.) were studied inselective hydrogenation of long-chain acetylenic alcohols to olefinic ones, which arethe intermediates in the production of vitamins A, K, E. We investigated bothheterogeneous and homogeneous polymer containing catalysts. In the case ofheterogeneous catalysts Pd nanoparticles formed in polyelectrolyte layers weredeposited on γ-Al 2 O 3 . HPS was also investigated as a heterogeneous catalyst on thebase of metal contained polymeric matrix. For all the catalysts, the optimal conditions(solvent, temperature, pH, catalyst and substrate amount, stirring) providing the highselectivity of hydrogenation up to 99.5% were found.IntroductionThe most important problem in industrial catalysis is the problem of achieving highselectivity, activity and technological performance of catalytic systems used in fineorganic synthesis as it is connected with economical indices, quality of the targetproducts and ecological situation.In this study we report on the reaction of selective hydrogenation of DHL (3,7-dimethyl-6-octaene-1-yne-3-ol, dehydrolinalool) to olefin alcohol LN (3,7-dimethyloctadiene-1,6-ol-3, linalool). Fig. 1 shows the way of the DHL hydrogenation. In this