Zur Acylierung von 2,3-Dihydro-l,3-diisopropyl-4,5- dimethylimidazol-2-yliden [1] / Acylation o f 2,3-Dihydro-l,3-diisopropyl-4,5-dimethylimidazol-2-ylidene [1

Abstract

Abstract Acylation, Heterocycles, Imidazoles 2,3-Dihydro-l,3-diisopropyl-4,5-dimethylimidazol-2-ylidene (2, Im) reacts with PhC(O)X to give the imidazolium salts [PhC(O)Im]F (3) and [PhC(O)Im]Cl (5). From 3 and the corre­ sponding fluoro compounds, the salts [PhC(O)Im][BF4] (4a), [PhC(O)Im][Ph3SiF2] (4b) and [PhC(O)Im] [Ph3SnF2] (4c) are obtained. 2 reacts with oxalylic chloride under CO elimination to give the salt [Im2CO]Cl2 (7). The X-ray data of 4c and 7 · 4 H20 · 2 HCl ([Im2CO][Cl4H10O4]) are reported.