A strongly positive dendrimer effect in asymmetric catalysis: allylic aminations with Pyrphos-palladium functionalised PPI and PAMAM dendrimersElectronic supplementary information (ESI) available: experimental procedures for the synthesis and metallation of phosphane dendrimers, and catalytic studies. See http://www.rsc.org/suppdata/cc/b3/b302155f/

23 April 2003

journal article
Published by Royal Society of Chemistry (RSC) in Chemical Communications

No. 11,p. 1228-1229
https://doi.org/10.1039/b302155f

Abstract

A remarkable and unprecedented increase in catalyst selectivity in dendrimer catalysis is observed for the Pyrphos-Pd catalysed allylic amination of 1,3-diphenyl-1-acetoxypropene as a function of the dendrimer generation (with up to 64 metal sites). This steady increase in ee-values for the allylic amination is less pronounced for the poly(propyleneimine)-derived catalysts than for the corresponding palladium-PAMAM dendrimer catalysts for which an increase in selectivity from 9% ee for a mononuclear reference system to 69% ee for the Pd₆₄-dendrimer was found.

Keywords

ASYMMETRIC CATALYSIS

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