Amphiphilic ruthenium benzylidene metathesis catalyst with PEG-substituted pyridine ligands

Journal of Polymer Science, Part A: Polymer Chemistry

Volumn 43, Issue 22, 2005, Pages 5715-5721

  Breitenkamp, Kurt ^a   Emrick, Todd ^a  

^a UNIVERSITY OF MASSACHUSETTS   (United States)

Author keywords

Amphiphiles; Catalysts; Metathesis; Polyolefins; ROMP; Water soluble polymers

Indexed keywords

AMPHIPHILES; METATHESIS; PYRIDINE LIGANDS;

ALUMINA; CATALYST ACTIVITY; POLYETHYLENE GLYCOLS;

RUTHENIUM COMPOUNDS;

EID: 30544449128     PISSN: 0887624X     EISSN: 10990518     Source Type: Journal    
DOI: 10.1002/pola.21061     Document Type: Article

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34. Meta-substituted PEG pyridine ligands have also been prepared and utilized. These are found to require longer reaction time for successful ligand exchange with 2, and comparable metathesis activity compared with 3.
35. Thus far, attempts to remove excess ligand using conventional flash chromatography have resulted in decomposition of catalyst 3, presumably because of the affinity of the PEG-pyridine ligands for silica gel.