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Título: | Heteropoly acid catalysts for the synthesis of fragrance compounds from biorenewables : isomerization of limonene oxide. |
Autor(es): | Costa, Vinícius Vieira Rocha, Kelly Alessandra da Silva Kozhevnikov, Ivan V. Kozhevnikova, Elena Fedorovna Gusevskaya, Elena Vitalievna |
Data do documento: | 2013 |
Referência: | COSTA, V. V. et al. Heteropoly acid catalysts for the synthesis of fragrance compounds from biorenewables: isomerization of limonene oxide. ChemCatChem, v. 5, p. 244-250, 2013. Disponível em: <http://onlinelibrary.wiley.com/doi/10.1002/cctc.201300208/abstract>. Acesso em: 20 mai. 2017. |
Resumo: | The liquid-phase isomerization of limonene oxide was studied in the presence of heteropoly acid catalysts in aprotic solvents in homogeneous and heterogeneous systems. Among the catalysts were bulk and silica-supported tungstophosphoric acid H3PW12O40 and its acidic Cs salt Cs0.5H0.5PW12O40 (CsPW). The reaction gave dihydrocarvone, a valuable fragrance intermediate, as the main product with turnover numbers of up to 8000. The nature of the solvent had a strong effect on reaction rate and selectivity. CsPW (0.1 mol%) was found to be a highly efficient and truly heterogeneous catalyst for this reaction, providing 82% yield of dihydrocarvone in 1,4-dioxane as a solvent under ambient conditions. This simple catalytic method represents economically attractive route to industrially important compounds starting from bio-renewable substrates easily available from essential oils. |
URI: | http://www.repositorio.ufop.br/handle/123456789/7852 |
Link para o artigo: | http://onlinelibrary.wiley.com/doi/10.1002/cctc.201300208/abstract |
DOI: | https://doi.org/10.1002/cctc.201300208 |
ISSN: | 1867-3899 |
Aparece nas coleções: | DEQUI - Artigos publicados em periódicos |
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