Beilstein J. Org. Chem.2015,11, 2087–2096, doi:10.3762/bjoc.11.225
revealed that during immobilization ion exchange between Hoveyda–Grubbs type catalyst and zeolitic support occurred in the case of Cl− counter anion; in contrast, PF6− counter anion underwent partial decomposition.
Keywords: Hoveyda–Grubbs type catalyst; hybrid catalysts; lamellarzeolites; non-covalent
cis-3-hexenyl acetate, the created catalytically active centers were able to ensure rapid propagation regardless the kind of substrate molecules.
Conclusion
Hoveyda–Grubbs type metathesis catalysts with quaternary ammonium tags on NHC ligands HGIIN+Cl− and HGIIN+PF6− were immobilized on lamellar
zeolites MCM-22, MCM-56, and MCM-36. Linker-free immobilizations, consisting in mixing zeolite supports with catalyst solutions and stirring the corresponding suspensions at room temperature, were successfully used. Hybrid catalysts formed (Ru content from 0.7 to 1.1 wt %) exhibited a firm attachment of Ru
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Graphical Abstract
Figure 1:
Hoveyda–Grubbs type catalysts used for immobilization.