Ultrasound irradiation promoted lipase-catalyzed synthesis of flavonoid esters with unsaturated fatty acids

文献类型： 外文期刊

第一作者： Zheng, Ming-Ming

作者： Zheng, Ming-Ming;Wang, Lian;Huang, Feng-Hong;Guo, Ping-Mei;Wei, Fang;Deng, Qian-Chun;Zheng, Chang;Wan, Chu-Yun

作者机构：

关键词： Ultrasound irradiation;Lipase-catalyzed esterification;Flavonoid esters;Unsaturated fatty acids

期刊名称：JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC （ 影响因子：2.269； 五年影响因子：2.328 ）

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收录情况： SCI

摘要： This study was focused on the enzymatic esterification of rutin and naringin with different free unsaturated fatty acids to produce the corresponding flavonoid esters catalyzed by Novozym 435 under ultrasound pretreatment. An ultrasonic frequency of 25 kHz, power of 200 W for rutin and 150W for naringin and time of 1 h was determined to guarantee satisfactory degree of esterification and lipase activity. The influence of substrates concentration and molar ratio was investigated subsequently. The optimum production was achieved in component solvent of acetone and 2-methyl-2-butanol for rutin and pure 2-methyl-2-butanol for naringin at 50 °C with flavonoid concentration of 40 mM and flavonoid to fatty acid molar ratio of 1:4, resulting in a flavonoid esters conversion of above 83.2% in relative short reaction time (48-72 h). In optimum conditions, the overall esterification reaction time using the ultrasonic pretreatment process was 24 h shorter than that of mechanical stirring process without damaging the lipase activity.

分类号： O64

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