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Título

Synthesis of propyl gallate by transesterification of tannic acid in aqueous media catalysed by immobilised derivatives of tannase from Lactobacillus plantarum

AutorFernández-Lorente, Gloria ; Bolívar Bolívar, Juan Manuel ; Rocha-Martín, Javier ; Curiel, José Antonio ; Muñoz, Rosario ; Rivas, Blanca de las ; Carrascosa, Alfonso V. ; Guisán, José Manuel
Palabras claveTransesterifications in aqueous media
Natural antioxidants
1-Propanol
Fecha de publicación1-sep-2011
EditorElsevier
CitaciónFood Chemistry 128(1): 214–217 (2011)
ResumenImmobilised derivatives of tannase from Lactobacillus plantarum were able to catalyse the transesterification of tannic acid by using moderate concentrations of 1-propanol in aqueous media. Transesterification of tannic acid was very similar to transesterification of methyl gallate. The synthetic yield depended on the pH and concentration of 1-propanol, although it did not vary much when using 30% or 50% 1-propanol. Synthetic yields of 45% were obtained with 30% of 1-propanol at pH 5.0. The product was chromatographically pure, and the reaction by-product was 55% pure gallic acid. On the other hand, immobilised tannase was fairly stable under optimal reaction conditions.
Versión del editorhttp://dx.doi.org/doi:10.1016/j.foodchem.2011.02.057
URIhttp://hdl.handle.net/10261/48287
DOI10.1016/j.foodchem.2011.02.057
ISSN0308-8146
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