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首页> 外文期刊>Applied biochemistry and biotechnology, Part A. enzyme engineering and biotechnology >Lipase-Catalyzed Esterification of Selected Phenolic Acids With Linolenyl Alcohols in Organic Solvent Media
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Lipase-Catalyzed Esterification of Selected Phenolic Acids With Linolenyl Alcohols in Organic Solvent Media

机译:在有机溶剂介质中脂肪酶催化的亚麻酚与酚类酯化酯化反应

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摘要

Lipase-catalyzed esterification of selected phenolic acids with linolenyl alcohols was investigated in selected organic solvent media.The enzyme activity for the esterification of dihydrocaffeic acid with linolenyl alcohol in solvent mixtures of hexane/2-butanone of 75:25 (v/v) and 65:35 (v/v) was 0.88 and 0.47mumol of esterified dihydrocaffeic acid/ (g of solid enzyme-min),respectively,with a corresponding esterification yield of 76 and 58%,respectively.However,the esterification of ferulic acid with linolenyl alcohol in the reaction medium of hexane/2-butanone of 65:35 (v/v) resulted in a low yield (16%).Using the reaction medium of hexane/2-butanone of 75:25 (v/v),an increase in linolenyl alcohol concentration with a concomitant use of a constant amount of dihydrocaffeic acid resulted in an increase in esterification yield.The highest esterification yield of 99% was obtained with a ratio of dihydrocaffeic acid to linolenyl alcohol of 1:8 after 7 d of reaction.Biosynthesis of the end product,linolenyl dihydrocaffeate,was confirmed by electrospray ionization mass spectroscopy structural analysis;the ester product demonstrated an antiradical activity close to that of alpha-tocopherol.
机译:在选定的有机溶剂介质中研究了脂肪酶催化的酚类化合物与亚油基烯醇的酯化反应。在75:25(v / v)的己烷/ 2-丁酮及65:35(v / v)分别为0.88和0.47mumol酯化的二氢咖啡酸/(g固体酶-min),分别对应的酯化率为76和58%。 65:35(v / v)的己烷/ 2-丁酮反应介质中的亚油基烯醇收率低(16%)。使用75:25(v / v)的己烷/ 2-丁酮反应介质,同时使用恒定量的二氢咖啡酸增加亚油基烯醇的浓度会导致酯化收率的增加。当7后,二氢咖啡酸与亚油基烯醇的比例为1:8时,酯化率最高,为99%反应d。末端的生物合成通过电喷雾电离质谱结构分析证实了该产品,亚麻烯基二氢咖啡酸酯;该酯产品显示出与α-生育酚接近的抗自由基活性。

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