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Published March 19, 2009 | Supplemental Material
Journal Article Open

Well-defined silica-supported olefin metathesis catalysts


Two triethoxysilyl-functionalized N-heterocyclic carbene ligands have been synthesized and used to prepare the corresponding second-generation ruthenium olefin metathesis catalysts. These complexes were then grafted onto silica gel, and the resulting materials were efficient heterogeneous catalysts for a number of metathesis reactions. The solid-supported catalysts were shown to be recyclable over a number of reaction cycles, and no detectable levels of ruthenium were observed in reaction filtrates (ruthenium concentration of filtrate <5 ppb).

Additional Information

© 2009 American Chemical Society. Received January 5, 2009. We gratefully acknowledge financial support from DOE Grant No. DE-FG02-08ER15933 to R.H.G. and to NSERC of Canada for a postdoctoral fellowship to D.P.A. Supporting Information Available: Experimental procedures and characterization data for new compounds and all procedures for catalytic studies.

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