53668-48-7Relevant academic research and scientific papers
Development of a convoluted polymeric nanopalladium catalyst: α-alkylation of ketones and ring-opening alkylation of cyclic 1,3-diketones with primary alcohols
Yamada, Yoichi M.A.,Uozumi, Yasuhiro
, p. 8492 - 8498 (2008/02/09)
A novel solid-phase catalyst of palladium nanoparticles, nano-Pd-V, was prepared from PdCl2 with main-chain viologen polymers via complexation and reduction. This insoluble nanocatalyst nano-Pd-V efficiently promoted α-alkylation of ketones with primary alcohols in the presence of Ba(OH)2·H2O under atmospheric conditions without organic solvents. The nano-Pd-V catalyst was reused without loss of catalytic activity. Ring-opening alkylation of cyclic 1,3-diketones with primary alcohols was also catalyzed by the nano-Pd-V catalyst.
Problems in Selective Catalysis with Molecular Imprints in Silica - Selective Lactones Formation from Hydroxyesters in Micropores
Heilmann, Jens,Maier, Wilhelm F.
, p. 460 - 468 (2007/10/02)
Selective lactone formation from hydroxy esters can be obtained with microporous glass catalysts.By a sol-gel polycocondensation of TEOS and a cyclic phosphonate an imprinted microporous silica catalyst was prepared.The imprint molecule selected is a transition state analogue for the lactone formation from hydroxy esters.Although selective γ- and δ-lactone formation from the respective hydroxy esters was observed, control experiments revealed, that the catalytic selectivity of the lactone formation is already obtained by the micropores of the material and not associated to the imprint.The study illustrates the importance of proper control experiments for the evaluation of imprint effects in selectively catalyzed reactions. - Keywords: Micropores, Selective Lactones Formation, Silica Catalyst
