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Closed Access item Synthesis of propyl gallate by transesterification of tannic acid in aqueous media catalysed by immobilised derivatives of tannase from Lactobacillus plantarum
Bolivar, Juan M.
Curiel, José Antonio
Rivas, Blanca de las
Carrascosa, Alfonso V.
Guisán, José M.
|Keywords:||Transesterifications in aqueous media, Natural antioxidants, 1-Propanol|
|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|
|Appears in Collections:||(IFI) Artículos|
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