Synthesis and Catalytic Activity of Coumarin‐ and Chrysin‐Tethered Triazolylidene Gold(I) Complexes

A series sterically‐encumbered coumarin‐ ( 1 ) and chrysin‐functionalized triazolium salts ( 2 , 3 ) have been synthesized stepwise via copper catalyzed alkyne–azide cycloaddition and N ‐alkylation procedures. Their one‐pot deprotonation with KHMDS in presence of AuCl(SMe 2 ) allowed for the preparation of the corresponding triazolylidene gold(I) complexes ( 4–6 ) in high yields (75–92 %). All new compounds were fully characterized by means of 1 H and 13 C NMR spectroscopy, FT‐IR, elemental analyses and in the case of triazole F , triazolium 1 and the gold complex 4 , by single‐crystal X‐ray diffraction. The new triazolylidene gold complexes ( 4–6 ) were tested as precatalysts in the synthesis of indole derivatives via an intramolecular hydroamination reaction of several readily available anilines.