41 research outputs found
“Tetralkylammonium and sodium decatungstate heterogenized on silica: Effects of the nature of cations on the photocatalytic oxidation of organic substrates”
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Clay-water Mixture: an Heterogeneous and Eco-efficient Catalyst for the Three-component Stereoselective Synthesis of Tetrahydroquinolines
No full textAddizione Enantioselettiva di Composti 1,3-Dicarbonilici a Nitrolefine Promossa da Catalizzatori Solidi Chirali
No full textMetalli di Transizione su Matrici Silicee: Catalizzatori Eco-compatibili per la Sintesi di Prodotti della Chimica Fine
No full textClay/water mixtures - A heterogeneous and ecologically efficient catalyst for the three-component stereoselective synthesis of tetrahydroquinolines
No full textThe three-component synthesis of tetrahydroquinolines 5 from aromatic amines 1, aromatic aldehydes 2 and cyclopentadiene (4) can be efficiently performed in water in the presence of the commercially available bentonite Bieliaca. The overall process involves the rapid initial production of the imines 3, which subsequently undergo aza-cycloaddition processes with clopentadiene, affording products in good yields and with excellent selectivities. The cycloaddition step is regiospecific and stereospecific, exclusively giving the endo product. It was possible to reuse the catalyst several rimes without lowering its efficiency. The process represents a clean, safe and environmentally friendly route for the production of a class of natural products displaying a wide range of biological activities
Understanding the Influence of the Immobilization Procedure on the Catalytic Activity of Aminopropylsilicas in C-C Forming Reactions
No full textEnantioselective Ring Opening of Cyclic Anhydrides Promoted by Quinidine Anchored to Silica Supports
No full textPreparazione e Caratterizzazione di Catalizzatori Acidi Solidi per Processi Regio- e Stereoselettivi
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