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Styrene as ligand and support: An excellent polymer-supported ruthenium catalyst 1 has been developed in which the benzene rings of polystyrene are utilized as ligands to immobilize the ruthenium onto the polymer. In the presence of 1, ring-closing olefin metathesis proceeded smoothly to afford adducts in high yields. Furthermore, the catalyst was recovered quantitatively by filtration, and could be reused without loss of activity.
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Akiyama et al. (2002) studied this question.
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