维普资讯
第26卷第1期
食品与生物技术学报
Vo1.26 N0.1
2007年1月
Journal of Food Science and Biotechnology
Jan. 2007
文章编号:1673-1689(2007)01-0100—06
非水相酶促酯交换法合成抗坏血酸脂肪酸酯
袁红玲, 汤鲁宏 ' 陶文沂
(江南大学工业生物技术教育部重点实验室,江苏无锡214036)
摘要:研究了一种L_抗坏血酸脂肪酸酯(AFAE)合成新途径。实验结果表明,氢化棕榈油、大豆
油和海狗油等食用油脂作为脂肪酸基团供体,在固定化脂肪酶的催化下,在有机溶荆中与L一抗坏
血酸直接进行酯交换反应形成L一抗坏血酸脂肪酸酯。对反应介质体系的筛选发现,在叔戊醇中用
Novozym435催化此反应所得的产物浓度最高。对影响合成抗坏血酸脂肪酸酯的因素进行了探
讨,确定了最适反应条件:初始油脂底物浓度为200 600 mmol/L,温度为55℃,反应时间为9 h。
此条件下产物质量浓度可达43.51 g/L。
关键词:抗坏血酸脂肪酸酯;酶法合成;脂肪酶;有机溶剂
中图分类号:R 977.23 文献标识码:A
Enzymatic Synthesis of L-Ascorbyl Fatty Acid Esters via TransesterificatiOn
of Oil and L_Ascorbic Acid in Organic Media
YUAN Hong—ling, TANG Lu—hong, TA0 Wen—yi
(Key Laboratory of Industrial Biotechnology,Ministry of Education,Southern Yangtze University,Wuxi 21 4036,
China)
Abstract:A novel route for synthesis of L-ascorbyl fatty acid esters(AFAE)was investigated.
The experiment results show that edible oilsuch as hardened palm oil,soybean oil and Namibian
seal’S oilcan be used as the donor of fatty acid acyl group to synthesize the AFAE via
transesterificatjon with L—ascorbic acid in organic media catalyzed by immobilized lipase.Through
screening of reaction media and lipase,it was found that the highest product concentration could
be achieved by Novozym435 in tert-amyl alcoho1.The influence of substrate concentration,
reaction time etc.on the synthesis of L-ascorbic acid esters were also investigated and the
reaction conditions were optimized.For hardened palm oil,the optimum reaction conditions were
as follow:reaction time 9 hours under 55℃with the initial concentration of oil 200~600 mmol/
L.By combinational of optimal reaction conditions,the product concentration could be achieved
at 43.51 g/L.
Key words:ascorbyl fatty acid esters(AFAE);enzymaticsynthesis;lipase;organic solvents
L_抗坏血酸脂肪酸酯(L—Ascorbyl Fatty Acid Esters,AFAE,结构见图1),包括 抗坏血酸月桂
收稿日期:2005-12-19.
作者筒介:袁红玲(1980一),女,安徽阜阳人,微生物与生物制药硕士研究生.
责任作者:汤鲁宏(1960一),男,江苏南京人,剐教授,工学博士,主要从事非水相酶促有机合成技术研究.
Email:lhtang@sytu.edu.Ell
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