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Título: | Heteropoly acid catalysis for the isomerization of biomass-derived limonene oxide and kinetic separation of the trans-isomer in green solvents. |
Autor(es): | Cotta, Rafaela Ferreira Martins, Rafael Pereira, Matheus Mello Rocha, Kelly Alessandra da Silva Kozhevnikova, Elena Fedorovna Kozhevnikov, Ivan V. Gusevskaya, Elena Vitalievna |
Palavras-chave: | Bio-renewables |
Data do documento: | 2019 |
Referência: | COTTA, R. F. et al. Heteropoly acid catalysis for the isomerization of biomass-derived limonene oxide and kinetic separation of the trans-isomer in green solvents. Applied Catalysis A: General, v. 584, n. 117173, ago. 2019. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0926860X1930328X>. Acesso em: 10 fev. 2020. |
Resumo: | Terpenes are an abundant class of natural products, which is important for flavor and fragrance industry. Many acid catalyzed reactions used for upgrading terpenes still involve mineral acids as homogeneous catalysts and/or toxic solvents. Heteropoly acids represent a well-established eco-friendly alternative to conventional acid catalysts. As these reactions are usually performed in the liquid phase, solvents play a critical role for the process sustainability. In the present work, we developed a catalytic route to valuable fragrance ingredients, dihydrocarvone and carvenone, from limonene oxide by its isomerization using silica-supported tungstophosphoric acid as a heterogeneous catalyst and dialkylcarbonates as green solvents. The reaction pathway can be switched between dihydrocarvone and carvenone (obtained in 90% yield each) simply by changing the reaction temperature. In addition, we developed an efficient method for kinetic separation of trans-limonene oxide from commercial cis/trans-limonene oxide mixture and stereoselective synthesis of trans-dihydrocarvone. |
URI: | http://www.repositorio.ufop.br/handle/123456789/12348 |
Link para o artigo: | https://www.sciencedirect.com/science/article/pii/S0926860X1930328X |
DOI: | https://doi.org/10.1016/j.apcata.2019.117173 |
ISSN: | 0926-860X |
Aparece nas coleções: | DEQUI - Artigos publicados em periódicos |
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ARTIGO_HeteropolyAcidCatalysis.pdf Restricted Access | 324,15 kB | Adobe PDF | Visualizar/Abrir |
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