Bis-NHC and mixed NHC/PR₃ copper(I) complexes (NHC = N-heterocyclic carbene) were found to be efficient catalysts enabling the azide–alkyne cycloaddition reaction leading to the formation of 1,2,3-sulfonyltriazoles under Click conditions. The mechanism of this transformation was probed and decoordination of the NHC ligand (even in the NHC/PR₃ mixed ligand systems) during the catalytic transformation was observed.

中文翻译：

---

铜（I）-N-杂环碳配合物作为在空气中合成1,4-二取代的1,2,3-磺酰基三唑的高效催化剂

发现双-NHC和NHC / PR ₃混合铜（I）配合物（NHC = N-杂环卡宾）是有效的催化剂，能够使叠氮化物-炔烃环加成反应，从而在点击条件下形成1,2,3-磺酰基三唑。探讨了这种转化的机理，并观察到了催化转化过程中NHC配体的失配作用（甚至在NHC / PR ₃混合配体系统中）。