Synthesis of Azoimidazolium Dyes with Nitrous Oxide |
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| Authors: | Dr Alexander G Tskhovrebov Lara C E Naested Dr Euro Solari Dr Rosario Scopelliti Prof Kay Severin |
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| Institution: | Institut des Sciences et Ingénierie Chimiques, école Polytechnique Fédérale de Lausanne (EPFL) |
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| Abstract: | 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? H activation process provides azoimidazolium dyes in good yields. |
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| Keywords: | azo coupling C H activation dyes carbenes nitrous oxide |
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