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- W2095369963 abstract "Abstract Neat reactions of 1‐(pyrazolylmethyl)imidazole with an excess of alkyl or polyfluoroalkyl halides at 100 °C followed by subsequent metathetical reactions with LiN(SO 2 CF 3 ) 2 or KPF 6 at 25 °C gave rise to a series of monoquaternary salts 3a – 3k . These salts can be also prepared through treatment of 1‐alkylimidazole with 1‐(chloromethyl)pyrazole hydrochloride in the presence of base, followed by anion exchange with LiN(SO 2 CF 3 ) 2 or KPF 6 . Their phase‐transition temperature, thermal stability, density and solubility in common solvents have been investigated. Most of the bis(trifluoromethanesulfon)amide salts are room‐temperature ionic liquids. The effect of anions and of alkyl substituents bonded to the imidazolium cation on the physicochemical properties was examined. Using 3‐butyl‐1‐(pyrazolylmethyl)imidazolium chloride ( 2d ), the precursor of 3‐butyl‐1‐(pyrazolylmethyl)imidazolium bis(trifluoromethanesulfon)amide ( 3d ), as a reactant, a hemilabile (N‐heterocyclic carbene)palladium(II) complex 4 was synthesized through a (carbene)silver(I) transfer reagent. It was characterized by single‐crystal X‐ray diffraction analysis. The catalytic activity and recyclability of 4 in 3d were preliminarily evaluated by consecutive Heck reactions using different substrates. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)" @default.
- W2095369963 created "2016-06-24" @default.
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- W2095369963 date "2007-01-10" @default.
- W2095369963 modified "2023-10-06" @default.
- W2095369963 title "Synthesis and Characterization of Pyrazolyl‐Functionalized Imidazolium‐Based Ionic Liquids and Hemilabile (Carbene)palladium(II) Complex Catalyzed Heck Reaction" @default.
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- W2095369963 doi "https://doi.org/10.1002/ejoc.200600828" @default.
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