Access to functionalised silver(I) and gold(I) N-heterocyclic carbenes by [2+3] dipolar cycloadditions.

Abstract

International audiencenew strategy was developed for the modification of silver(I) and gold(I) N-heterocyclic carbenes. Azido groups were grafted and used either by copper-catalysed azide-alkyne cycloaddition before metallation or by thermal and "strain-promoted" 1,3-dipolar cycloaddition after metallation to functionalise the metal-NHCs