Green Chemistry

Organic–inorganic hybrid silica materials containing imidazolium and dihydroimidazolium salts as recyclable organocatalysts for Knoevenagel condensations

M Trilla, R Pleixats, MWC Man, C Bied

文献索引：Trilla, Montserrat; Pleixats, Roser; Man, Michel Wong Chi; Bied, Catherine Green Chemistry, 2009 , vol. 11, # 11 p. 1815 - 1820

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被引用次数: 39

摘要

Organic–inorganic hybrid silica materials containing imidazolium and dihydroimidazolium salts prepared from monosilylated and disilylated monomers by sol–gel methodologies are active and reusable organocatalysts for the Knoevenagel condensation of aromatic aldehydes with malononitrile and ethyl cyanoacetate under solvent-free conditions. Our immobilized systems present higher activities than related homogeneous bis-imidazolium ...