Beilstein J. Org. Chem.2007,3, No. 22, doi:10.1186/1860-5397-3-22
behind such differences of the reaction outcome? To our knowledge, the mechanism of the Arduengo imidazolium salt synthesis has not been discussed in the literature. We propose that alkylation of the DADs A by formaldehyde and HCl (or TMSCl) leads to an iminiumsalt B (Scheme 2); analogous alkylations
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Graphical Abstract
Figure 1:
The carbenes IPr, IMes, IXy and their imidazolium salt precursors