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URI permanente para esta coleçãohttps://locus.ufv.br/handle/123456789/11800
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Item p-Sulfonic acid calix[n]arenes as organocatalysts for the transesterification reaction of Passiflora seed oil(Monatshefte für Chemie - Chemical Monthly, 2015-08-19) Liberto, Natália A.; Almeida, Camila G.; Souza, Isabella F.; Silva, Márcio J. da; Fernandes, Sergio A.; Hyaric, Mireille LeThe catalytic activity of p-sulfonic acid calix[4]arene was studied in the transesterification reactions of Passiflora seed oil with methanol or ethanol. Calix[n]arenes are highly versatile organocatalysts and conversion rates >98 % were obtained for the transformation of Passiflora seed oil to its methyl or ethyl esters after 5 h of reaction in the presence of p-sulfonic acid calix[4]arene (3.52 mol % in ethanol; 5.28 mol % in methanol). Moreover, the organocatalyst was recovered and reused in two subsequent cycles without a significant decrease in the activity or selectivity. The use of a non-corrosive and reusable organocatalyst is the positive aspect of this process.