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• W4210382010 abstract "• Activation of [Au 2 Cl 2 (μ-PP)] (PP = bis(phosphino)metallocene) compounds with Na[BArF 24 ] (BArF 24 = tetrakis(3,5-bis(trifluoromethyl)phenyl)borate) yields [Au 2 (μ-Cl)(μ-PP)][BArF 24 ]. • Activated compounds catalyze the hydroamination of phenylacetylene by alkyl amines. • Hydroamination of 2-ethynylpyridine with aniline derivates occurs in low yield. • The gold compounds catalyze the carboxylic cyclization of N-benzyl-but-2-yn-1-amine. The catalytic activity of [Au 2 (μ-Cl)(μ-bis(phosphino)ferrocene)][BArF 24 ] (BArF 24 = tetrakis(bis(3,5-triflouromethyl)phenyl)borate) compounds was investigated for intermolecular hydroamination reactions and a carboxylative cyclization reaction. Two types of intermolecular hydroamination reactions were studied, the first being the hydroamination of 2-ethynylpyridine with aniline derivatives. Various [Au 2 (μ-Cl)(μ-bis(phosphino)ferrocene)][BArF 24 ] compounds were successful in catalyzing this reaction, but gave low yields of the desired products. The second type of hydroamination reaction studied was the reaction of phenylacetylene with alkyl amines, including tert ‑butylamine, 1-hexylamine, isopropylamine, and cyclohexylamine. While the hydroamination reactions tended to give low yields, the choice of the bis(phosphino)ferrocene ligand did have an impact on the activity of the catalyst. The catalytic activity of these [Au 2 (μ-Cl)(μ-bis(phosphino)ferrocene)][BArF 24 ] compounds was also studied in the carboxylative cyclization of N-benzyl‑but-2-yn-1-amine. The majority of the gold catalysts examined successfully fixed carbon dioxide to this amine. The effect of changing the bis(phosphino)ferrocene ligands on the catalytic activity of these compounds will be presented for each of these catalytic systems. The addition of Na[BArF 24 ] (BArF 24 = tetrakis(3,5-bis(trifluoromethyl)phenyl)borate) to a series of [Au 2 Cl 2 (μ-PP)] (PP = bis(phosphino)metallocene) results in the formation of [Au 2 (μ-Cl)(μ-PP)][BArF 24 ]. These activated species show catalytic activity for the hydroamination of aryl alkynes and the carboxylic cyclization of N-benzyl‑but-2-yn-1-amine." @default.
• W4210382010 created "2022-02-08" @default.
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• W4210382010 date "2022-04-01" @default.
• W4210382010 modified "2023-09-25" @default.
• W4210382010 title "Hydroamination and carboxylative cyclization reactions catalyzed by of gold(I) compounds with 1,1ʹ-bis(phosphino)metallocene ligands" @default.
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• W4210382010 doi "https://doi.org/10.1016/j.jorganchem.2022.122283" @default.
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