期刊
DALTON TRANSACTIONS
卷 -, 期 41, 页码 9043-9051出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b909180g
关键词
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资金
- Federal Government of Germany
- Freistaat Sachsen
- Cluster of Excellence
- TU Berlin
- Deutsche Forschungsgemeinschaft
Ring-opening metathesis polymerization has been used for the synthesis of the amphiphilic block-copolymer poly(M1-co-M3)-b-poly(M2) from the hydrophilic monomer 5-{2-[2-(2-methoxy-ethoxy)-ethoxy]-ethoxymethyl}-7-oxabicyclo[2.2.1] hept-2-ene (M2), and the hydrophobic monomers endo, exo-5-decyloxymethyl-bicyclo[2.2.1] hept-2-ene (M1) and 1,3-di(1-mesityl)-4-{[(bicyclo[2.2.1] hept-5-en-2-ylcarbonyl)oxy] methyl}-4,5-dihydro-1H-imidazol-3-ium carboxylate (M3). Poly(M1-co-M3)-b-poly(M2) was loaded with Cu and the resulting Cu-I-loaded polymer poly(M1-co-M3)-b-poly(M2)-Cu was used for a series of Cu-catalyzed reactions under micellar conditions, i. e. for the [3 + 2] cycloaddition of azides to alkynes and for carbonyl hydrosilylation reactions. Under such micellar conditions, the polymer-bound Cu-catalyst was found to be an efficient catalyst for all reactions investigated. Turn-over numbers (TONs) in cycloaddition reactions were in the range of 200-375, those in hydrosilylation reactions similar to 2000 allowing for Cu-loadings of 0.05 mol% with respect to substrate.
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