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- W2079089229 abstract "The synthesis and characterization of a series of cationic copper(II) complexes of the type [Cu(NCR)(6)][Al(OC(CF(3))(2)R')(4)](2) (R = CH(3), Ph; R' = CF(3), Ph, PhCH(3)), incorporating poly/perfluoronated alkoxyaluminates as weakly coordinating anions (WCAs) is presented. Aziridination of various olefins, such as the unreactive olefins e.g. ethylhex-2-enoate and 1-decene, with N-tosyliminophenyliodinane catalyzed by [Cu(NCR)(6)][Al(OC(CF(3))(2)R')(4)](2) affords very good yields (up to 96%) and high TOFs (up to 5000 h(-1)) under mild conditions. Using disubstituted olefins as substrates, high stereoselectivities are obtained at room temperature. The to date highest cis : trans ratio (98 : 2) of the obtained aziridines is achieved for cis-stilbene in good yield (85%) as well as promising TOF (> 2000 h(-1)). The investigation of the solvent effect on yield and selectivity reveals that for certain oleophilic substrates (1-decene), less polar solvents, such as dichloromethane are a better choice than acetonitrile, which is commonly considered as the best solvent for olefin aziridination. Accordingly, a mechanism involving a paramagnetic copper nitrene intermediate with both concerted and stepwise pathways is proposed." @default.
- W2079089229 created "2016-06-24" @default.
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- W2079089229 date "2011-01-01" @default.
- W2079089229 modified "2023-10-18" @default.
- W2079089229 title "Copper(ii) complexes incorporating poly/perfluorinated alkoxyaluminate-type weakly coordinating anions: Syntheses, characterization and catalytic application in stereoselective olefin aziridination" @default.
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- W2079089229 doi "https://doi.org/10.1039/c1dt10280j" @default.
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