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research article
Synthesis of Azoimidazolium Dyes with Nitrous Oxide
A new method for the synthesis of industrially important azoimidazolium dyes is presented. The procedure is based on a reagent which is rarely used in the context of synthetic organic chemistry: nitrous oxide (“laughing gas”). N2O is first coupled to N-heterocyclic carbenes. Subsequent reaction with aromatic compounds through an AlCl3-induced C[BOND]H activation process provides azoimidazolium dyes in good yields.
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Angew-2015-Tskhovrebov.pdf
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