Silica-Supported Amine Catalysts for Carbon–Carbon Addition Reactions

Basic catalysts for carbon–carbon addition reactions were synthesized by immobilization of amine species on silica supports. Tetraethylenepentamine was impregnated and immobilized on amorphous silica (SiO 2 ) and SBA-15 using an epoxy resin. The basicity of the catalysts was determined by adsorption...

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Bibliographic Details
Published inTopics in catalysis Vol. 55; no. 7-10; pp. 580 - 586
Main Authors Silva M, Ernesto, Chakravartula S, Srikanth, Chuang, Steven S. C.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.07.2012
Subjects
Catalysis
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Original Paper
Pharmacy
Physical Chemistry
Immobilization
Claisen condensation
Basic catalyst
FTIR
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Summary:Basic catalysts for carbon–carbon addition reactions were synthesized by immobilization of amine species on silica supports. Tetraethylenepentamine was impregnated and immobilized on amorphous silica (SiO 2 ) and SBA-15 using an epoxy resin. The basicity of the catalysts was determined by adsorption–desorption of CO 2 and the degree of immobilization was evaluated by FTIR. The catalytic activity towards the Claisen condensation reaction of methyl benzoate and methyl ethyl ketone was evaluated by an in-situ FTIR micro-scale reactor. A mechanism is proposed to show that the catalysts promote the formation of β-diketone and methanol; the effects of the support and amine immobilization degree are discussed.
ISSN:1022-5528
1572-9028
DOI:10.1007/s11244-012-9828-9