Gold(I) complexes bearing ring‐fused benzoxazine‐derived triazolylidenes and their use in C–N bond‐forming processes

We report the synthesis and full characterization of a novel series of ring‐fused benzoxazine‐derived triazolium salts (1a–c) and their corresponding triazolylidene gold(I) complexes (2a–c). All new compounds were fully characterized by means of 1H and 13C NMR spectroscopy, elemental analyses, and mass spectroscopy and in the case of triazoliums 1a and 1b by single‐crystal X‐ray diffraction. The new triazolylidene gold complexes (2a–c) were tested as precatalysts in the hydroamination and hydrohydrazination of terminal alkynes employing aniline derivatives and hydrazine as nitrogen sources, respectively. The synthesis of a novel series of ring‐fused benzoxazine‐derived triazolylidene gold(I) complexes is reported. Catalytic applications of the new gold complexes in C–N bond‐forming processes are discussed.