Synthesis, characterisation and application of pyridine-modified chitosan derivatives for the first non-racemic Cu-catalysed Henry reaction.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorGonçalves, Fernanda Jorge-
Autor(es): dc.creatorKamal, Fadwa-
Autor(es): dc.creatorGaucher, Anne-
Autor(es): dc.creatorGil, Richard-
Autor(es): dc.creatorBourdreux, Flavien-
Autor(es): dc.creatorMartineau Corcos, Charlotte-
Autor(es): dc.creatorGurgel, Leandro Vinícius Alves-
Autor(es): dc.creatorGil, Laurent Frédéric-
Autor(es): dc.creatorPrim, Damien-
Data de aceite: dc.date.accessioned2025-08-21T15:36:52Z-
Data de disponibilização: dc.date.available2025-08-21T15:36:52Z-
Data de envio: dc.date.issued2019-05-07-
Data de envio: dc.date.issued2019-05-07-
Data de envio: dc.date.issued2018-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/11214-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S0144861717314091-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.carbpol.2017.12.012-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1019770-
Descrição: dc.descriptionThe preparation, characterisation and application of two pyridine-modified chitosan derivatives (C1 and C2) containing Cu(OAc)2 adsorbed as catalysts for the conversion of benzaldehyde into 2-nitro-1-phenylethanol are described. Quantitative solid-state 13C multiple-contact cross-polarization, magic-angle-spinning, nuclear magnetic resonance (MC-CP MAS NMR) measurements confirmed the successful grafting of 2-pyridinecarboxaldehyde and 6-methylpyridine-2-carboxaldehyde to the chitosan backbone and indicated that 47(±2)% of the NH2 groups were grafted for both C1 and C2. The use of C1-Cu(OAc)2 as a catalyst in the nitroaldol reaction led to 96(±1)% conversion and 19(±4)% enantiomeric excess (ee), while the use of C2-Cu(OAc)2 as a catalyst also promoted the nitroaldol reaction, affording almost quantitatively the expected 2-nitro-1-phenylethanol (98(±1)%) with 14.5(±1.5)% ee.-
Formato: dc.formatapplication/pdf-
Idioma: dc.languageen-
Direitos: dc.rightsrestrito-
Palavras-chave: dc.subjectSolid-state 13C NMR-
Palavras-chave: dc.subjectHeterogeneous catalysis-
Palavras-chave: dc.subjectCopper-
Título: dc.titleSynthesis, characterisation and application of pyridine-modified chitosan derivatives for the first non-racemic Cu-catalysed Henry reaction.-
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