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All the gold(III) complexes were rapidly reduced to the gold(I) chloride complexes under 365\u2005nm irradiation or ambient light while being thermally stable below 55\u2009\u00b0C. The mechanism of photoreduction through Cl<jats:sub>2<\/jats:sub> elimination is discussed based on a kinetic study and the chemical trapping of chlorine species: Cl<jats:sub>2<\/jats:sub>, radical Cl<jats:sup>.<\/jats:sup>, and possibly Cl<jats:sup>+<\/jats:sup>. The catalytic activities of the gold(III) chloride complexes and the corresponding gold(I) complexes obtained by in situ reduction were evaluated in the cyclization of <jats:italic>N<\/jats:italic>\u2010propargylic amides to oxazoles. The merits of such photoreducible complexes in homogeneous gold catalysis are illustrated by a cascade reaction catalyzed by thioether gold complexes that affords a 4<jats:italic>H<\/jats:italic>\u2010quinolizin\u20104\u2010one in high yields.<\/jats:p>","DOI":"10.1002\/chem.201804322","type":"journal-article","created":{"date-parts":[[2018,9,25]],"date-time":"2018-09-25T12:19:40Z","timestamp":1537877980000},"page":"18779-18787","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Photoreduction of Thioether Gold(III) Complexes: Mechanistic Insight and Homogeneous Catalysis"],"prefix":"10.1002","volume":"24","author":[{"given":"Zhen","family":"Cao","sequence":"first","affiliation":[{"name":"Institut des Sciences Mol\u00e9culaires, UMR CNRS 5255 Universit\u00e9 de Bordeaux  351 cours de la Lib\u00e9ration 33405 Talence France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dario 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