期刊
RSC ADVANCES
卷 5, 期 10, 页码 7058-7065出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra13924k
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资金
- FPI scholarship from the Spanish Ministry of Economy and Competitiveness (MINECO)
- Fondo Social Europeo from the EU
- Spanish MCYT Projects [MAT2010-17571, MAT2013-45460 R, MAT2011-29020-C02-02, FAMA S2009/MAT-1756, CSD2006-2001]
Four new indium metal-organic frameworks, MOFs, namely [In-2(hfipbb)(3)(1,10-phen)(2)]center dot 2H(2)O (InPF-12), [In-2(hfipbb)(3)(2,2'-bipy)(2)]center dot 2H(2)O (InPF-13), [In-2(hfipbb)(3)(4,4'-bipy)] (InPF-14) and [In-4(OH)(4)(hfipbb)(4)(4,4'-bipy)] (InPF-15), (InPF = indium polymeric framework, hfipbb = hexafluoroisopropylidene bisbenzoate, phen = phenantroline, bipy = bipyridine), have been hydrothermally obtained and result in efficient Lewis acid catalysts in solvent-free cyanosilylation of carbonyl compounds. For acetophenone: (i) the coordination number and mu-OH groups presence seem to be decisive factors to obtain a better catalytic behavior and (ii) the presence of Lewis base moieties (C=O groups not coordinated to indium cation), besides the Lewis acid sites, creates a two-component catalytic system, based on the dual activation phenomenon that makes InPF-15 the best catalyst in this type of reaction. It was also found that the use of this highly reactive, recyclable and environmentally benign catalyst allows the efficient synthesis of various trimethylsilyl cyanohydrins from a wide range of cyclic, aliphatic and aromatic ketones.
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