PROCESS FOR THE PREPARATION OF DISSYMMETRIC IMIDAZOLIUM SALTS

摘要

The present invention relates to a process for the preparation of an asymmetric imidazolium salt of formula (1): comprising bringing an arylamine of formula R1-NH2 into contact with a dicarbonyl compound of formula R3-CO-CO-R4, formaldehyde, a cycloalkylamine R2-NH2 and tetrafluoroboric acid, in the absence of organic solvent.