Abstract
AbstractImidazolium compounds have determined a profound impact on chemistry, and several synthetic methods to access them are well established. Here, we report the serendipitous discovery of the unprecedented route to a zwitterionic imidazolium molecule with the two nitrogen atoms substituted with 4‐cyclohexanecarboxylic acid: to build the five‐membered ring, glyoxal plays the double role of source for C2 and, unusually, C1 units, the latter via thermal decomposition affording carbon monoxide as side‐product. Compound I1 was characterized by elemental analysis, multinuclear NMR, IR and ESI‐MS spectroscopy.
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