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

Universite des Sciences et Technologies de Lille

Yves Castanet

Universite des Sciences et Technologies de Lille

André Mortreux

Universite des Sciences et Technologies de Lille

Microporous and Mesoporous Materials

1387-1811 (ISSN)

Vol. 116 424-431

Ämneskategorier

Kemiteknik

Kemi

DOI

10.1016/j.micromeso.2008.05.002