Imidazole carbenes

C - Chemistry – Metallurgy – 07 – D

Patent

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Details

C07D 233/06 (2006.01) C07D 233/10 (2006.01) C07D 521/00 (2006.01)

Patent

CA 2404755

A process for the preparation of imidazolium carbenes of formula (I) wherein R1 and R2 which can be the same or different, are hydrogen or linear or branched hydrocarbyl groups comprising heating an imidazolium halide with a strong base under reduced pressure and separating the resultant products is described. Also described is a process for the preparation of salts of these imidazolium carbenes,

La présente invention concerne un procédé de préparation de carbènes d'imidazolium de la formule (1), dans laquelle R¿1? et R¿2?, qui peuvent être les mêmes ou différents, désignent un hydrogène ou des groupes hydrocarbyle linéaires ou ramifiés, lequel procédé consiste à chauffer un halogénure d'imidazolium avec une base forte sous pression réduite et à séparer les produits obtenus. L'invention se rapporte également à un procédé de préparation de sels des carbènes d'imidazolium obtenus et à leur utilisation comme liquides ioniques.

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