Different homogeneous ruthenium catalysts such as the Grubbs-Herrmann- (RuCl2(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazolin-2-ylidene)(=CHPh)(PCy3)) and the Grubbs-Hoveyda-catalyst (RuCl2(=CH(2-(2-PrO-C6H4)(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazolin-2-ylidene)) were modified through chlorine exchange in reactivity and selectivity. The activity in olefin-metathesis could be improved. Exchange with CF3COOAg on the Hoveyda-Grubbs-catalyst provided the first time a catalyst active for the cycloalkynepolymerization. After further modifications of the catalyst, the polymerization could be performed in a living and controlled manner. Furthermore, the chlorine exchange was an attractive way of fixation of the catalyst to supports such as PS-DVP-CH2OH, ROMP-based monolithic supports and amphiphilic poly(2-oxazoline)n supports.
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Different homogeneous ruthenium catalysts such as the Grubbs-Herrmann- (RuCl2(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazolin-2-ylidene)(=CHPh)(PCy3)) and the Grubbs-Hoveyda-catalyst (RuCl2(=CH(2-(2-PrO-C6H4)(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazolin-2-ylidene)) were modified through chlorine exchange in reactivity and selectivity. The activity in olefin-metathesis could be improved. Exchange with CF3COOAg on the Hoveyda-Grubbs-catalyst provided the first time a catalyst active f...
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