Reactivity of 5-alkynyl-3,4-dihydro-2H-pyrroles with Au(III): Route to vinylgold(III) complexes, aurocycles by cyclisation of these complexes and ML complexes

Publication date: Available online 11 July 2019Source: Journal of Organometallic ChemistryAuthor(s): Huy-Dinh Vu, Christelle Bouvry, Jacques Renault, Arnaud Bondon, Fabian Lambert, Thierry Roisnel, Philippe UriacAbstractThe reaction of 5-alkynyl-3,4-dihydro-2H-pyrroles (imine) with AuCl3 led to the synthesis of the vinyl gold (III) complexes 3 that could give the aurocycles 4 with an excess of AuCl3. In the base presence the dimerization of 4 was observed leading to 5. If NaAuCl4 was used as gold (III) source a ligand exchange was observed leading to the complexes 6. Nucleophilicity of both nitrogen atom and alkyne function as well as imine-enamine tautomerism were involved to explain the formation of 3.Graphical abstract
Source: Journal of Organometallic Chemistry - Category: Chemistry Source Type: research
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