Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 3, Issue 8-9, Pages 1256-1265Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.200800144
Keywords
carbenoid; catalysis; nanoparticles; ruthenium; soluble polymers
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Funding
- Areas of Excellence Scheme [AoE/P10-01]
- Hong Kong Research Grants Council [HKU 7012/05P]
- The University of Hong Kong
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Ruthenium nanoparticles supported on non-cross-linked soluble polystyrene were prepared by reacting [RuCl2(C6H5CO2Et)](2) with polystyrene in open air. They effectively catalyze intra- and intermolecular carbenoid insertion into C-H and N-H bonds, alkene cyclopropanation, and ammonium ylide/[2,3]-sigmatropic rearrangement reactions. This supported ruthenium catalyst is much more reactive than [RuCl2(p-cymene)](2) and [Ru(Por)CO] for catalytic intermolecular carbenoid C-H bond insertion into saturated alkanes. By using alpha-diazoacetamide as a substrate for intramolecular carbenoid C-H insertion, the supported ruthenium catalyst can be recovered and reused for ten successive iterations without significant loss of activity.
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