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1,4-conjugate addition reaction catalyzed by a homogeneous rhodium catalyst entrapped in hydrophobized ordered mesoporous silica

Paul Handa (Institutionen för kemi- och bioteknik, Teknisk ytkemi) ; Krister Holmberg (Institutionen för kemi- och bioteknik, Teknisk ytkemi ; Kompetenscentrum katalys (KCK)) ; Mathieu Sauthier ; Yves Castanet ; André Mortreux
Microporous and Mesoporous Materials (1387-1811). Vol. 116 (2008), 1-3, p. 424-431.
[Artikel, refereegranskad vetenskaplig]

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.



Denna post skapades 2008-12-10. Senast ändrad 2016-08-15.
CPL Pubid: 80871

 

Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Teknisk ytkemi (2005-2014)
Kompetenscentrum katalys (KCK)

Ämnesområden

Kemi
Kemiteknik

Chalmers infrastruktur