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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/48287
Title: Synthesis of propyl gallate by transesterification of tannic acid in aqueous media catalysed by immobilised derivatives of tannase from Lactobacillus plantarum
Authors: Fernández-Lorente, Gloria; Bolívar Bolívar, Juan Manuel ; Rocha-Martín, Javier ; Curiel, José Antonio; Muñoz, Rosario; Rivas, Blanca de las; Carrascosa, Alfonso V. ; Guisán, José Manuel
Keywords: Transesterifications in aqueous media
Natural antioxidants
Issue Date: 1-Sep-2011
Publisher: Elsevier
Citation: Food Chemistry 128(1): 214–217 (2011)
Abstract: Immobilised 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.
Publisher version (URL): http://dx.doi.org/doi:10.1016/j.foodchem.2011.02.057
URI: http://hdl.handle.net/10261/48287
ISSN: 0308-8146
DOI: 10.1016/j.foodchem.2011.02.057
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