1,4-conjugate addition reaction catalyzed by a homogeneous rhodium catalyst entrapped in hydrophobized ordered mesoporous silica
Artikel i vetenskaplig tidskrift, 2008

A 1,4-conjugate addition reaction between p-carboxyphenylboronic acid and methyl acrylate has been performed using a homogenous rhodium catalyst entrapped in the hydrophobic pores of hydrophobized ordered mesoporous silica. The catalyst-loaded inorganic particles were dispersed in an aqueous solution containing the reactants. The yields obtained were higher than that obtained in the conventional liquid-liquid two-phase system. From the recycling experiments it was demonstrated that with hydrophobized ordered mesoporous silica as support a catalytic activity extending over several consecutive runs compared to the liquid-liquid two-phase system could be obtained. The major advantage with having the catalyst "heterogenized" by entrapment into the siliceous material is the simplicity of the work-up process. The porous particles, containing the catalyst, are simply removed by filtration after completed reaction and the product precipitated from water upon acidification.

Författare

PAUL HANDA

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Krister Holmberg

Kompetenscentrum katalys (KCK)

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Mathieu Sauthier

Lille I: Universite des Sciences et Technologies de Lille

Yves Castanet

Lille I: Universite des Sciences et Technologies de Lille

André Mortreux

Lille I: Universite des Sciences et Technologies de Lille

Microporous and Mesoporous Materials

1387-1811 (ISSN)

Vol. 116 1-3 424-431

Ämneskategorier

Kemiteknik

Kemi

DOI

10.1016/j.micromeso.2008.05.002

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Senast uppdaterat

2018-05-14