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- W2050873427 abstract "Reaction of 1-mesityl imidazole with 2-bromo-4,4-dimethyloxazoline gave the 2-(4,4-dimethyl)oxazolinyl imidazolium salt 1, which was converted to the silver N-heterocyclic carbene complex [AgI(carbene)Br] 2 by stirring 1 with Ag2O in dichloromethane at room temperature. The crystal structure analysis confirmed the monomeric nature of complex 2, the coordination around the metal being quasi-linear with a C(1)−Ag−Br bond angle of 169.4(1)° and a Ag−C(1) bond length of 2.093(4) Å. The silver complex 2 was reacted with [PdCl2(COD)] to yield the corresponding mono-carbene-palladium complex 3, for which an X-ray diffraction study established a distorted square planar configuration with the imidazolyl and the oxazolinyl ring lying in the molecular plane. The palladium complex 3 was found to be an active catalyst for the Heck and Suzuki C−C coupling reactions. The coupling of activated or deactivated bromoarenes proceeded rapidly even with a low catalyst loading (0.02 mol %), while the reaction with activated chloroarenes required a higher catalyst loading of 3 mol %." @default.
- W2050873427 created "2016-06-24" @default.
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- W2050873427 date "2002-10-25" @default.
- W2050873427 modified "2023-10-17" @default.
- W2050873427 title "Direct Coupling of Oxazolines and N-Heterocyclic Carbenes: A Modular Approach to a New Class of C−N Donor Ligands for Homogeneous Catalysis" @default.
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- W2050873427 doi "https://doi.org/10.1021/om020608b" @default.
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