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The cyclisation of alkynyl alcohols and carboxylic acids in the presence of a [Cu(NHC)2]X complex is reported. The reactions were carried out in technical grade toluene in the presence of air with a catalyst that is readily accessible. N‐Heterocyclic carbenes are recognised for stabilising metal centres in a range of oxidation states, and this work further supports that NHCs can also be used as activation...