The alkylation or iodination of imidazol(in)ium salts takes place readily in the presence of Cs2CO3. The procedure is very easy to implement and provides facile and straightforward access to a wealth of C2-substituted azolium salts. Furthermore, a C2α alkylation is also feasible, which extends the chemistry of NHCs and weak bases to their NHO analogues.
F. Mazars, G. Zaragoza and L. Delaude, Chem. Commun., 2023, 59, 14528 DOI: 10.1039/D3CC04971J
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