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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Evaluating Gold and Selenium Chemistry for Selective Transformations of Lignin Model Compounds

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Autor(es):
Santos, Wagner C. C. [1] ; Dias, Kevin A. [1] ; Santos, Leidaiany P. [1] ; Kisukuri, Camila M. [1] ; Rodrigues, Thenner S. [1] ; Geonmonond, Rafael S. [1] ; Camargo, Pedro H. C. [1] ; Andrade, Leandro H. [1]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Chem, Ave Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: ADVANCED SYNTHESIS & CATALYSIS; v. 360, n. 7, p. 1376-1383, APR 3 2018.
Citações Web of Science: 2
Resumo

Applications of gold and selenium chemistry are reported as novel approaches to promote lignin depolymerization into more valuable chemicals via selective oxidation reactions (alcohol oxidations and Baeyer-Villiger reactions). In this study, we proposed two different oxidative methodologies using Au/SiO2 and phenylseleninic acid resin (PAR) as stable and reusable catalysts to promote selective transformations of the -O-4 linkage of lignin model compounds. After evaluating the catalytic systems under batch conditions, they were both applied in a packed-bed reactor for continuous flow operations. By using Au/SiO2 as a catalyst under flow conditions, ketones were efficiently obtained (up to 86% conversion) from the oxidation of alcohols with a residence time (t(R)) of 30min. In the case of Baeyer-Villiger oxidations catalyzed by phenylseleninic acid resin, the corresponding esters were obtained in up to 91% conversion (t(R)=30min). Both systems efficiently catalyzed the conversion of the lignin model compounds. (AU)

Processo FAPESP: 15/21366-9 - Materiais híbridos contendo nanopartículas metálicas para aplicações catalíticas
Beneficiário:Pedro Henrique Cury Camargo
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 14/22457-5 - Desenvolvimento de sistemas biocatalíticos para reações de oxidação e redução
Beneficiário:Leandro Helgueira de Andrade
Linha de fomento: Auxílio à Pesquisa - Regular