Jump to main content
Jump to site search

Issue 10, 2011
Previous Article Next Article

The role of the dendritic support in the catalytic performance of peripheral pincer Pd-complexes

Author affiliations

Abstract

To investigate the effects of the dendrimer backbone on catalysis, a series of monomeric and dendritic SCS-pincer Pd-complexes was synthesized and tested in two different Pd(II)-catalyzed reactions. To this end, the three novel polar PAMAM dendrimer-immobilized SCS-pincer Pd-complexes 3, 4, and 5, and the two apolar carbosilane dendrimer-immobilized complexes 7 and 8 were compared to three monomeric analogues 1, 2 and 6. These complexes were investigated in the cross-coupling reaction between vinyl epoxide and styrylboronic acid and the auto-tandem reaction of cinnamyl chloride, hexamethylditin, and 4-nitrobenzaldehyde. The differences in catalytic rate and product selectivity for these complexes are described and discussed. For the cross coupling reaction, the PAMAM dendrimer-immobilized complexes were found to give a similar reaction rate, but a higher product selectivity than their monomeric counterparts. The carbosilane complexes showed a lower reaction rate and similar product selectivity. These observations are explained in view of dendrimer aggregation and peripheral group backfolding.

Graphical abstract: The role of the dendritic support in the catalytic performance of peripheral pincer Pd-complexes

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Apr 2011, accepted on 27 Jun 2011 and first published on 15 Aug 2011


Article type: Paper
DOI: 10.1039/C1NJ20366E
Citation: New J. Chem., 2011,35, 2356-2365
  •   Request permissions

    The role of the dendritic support in the catalytic performance of peripheral pincer Pd-complexes

    N. J. M. Pijnenburg, M. Lutz, M. A. Siegler, A. Spek, G. van Koten and R. J. M. K. Gebbink, New J. Chem., 2011, 35, 2356
    DOI: 10.1039/C1NJ20366E

Search articles by author

Spotlight

Advertisements