Enantioselective synthesis of 3-hydroxytetradecanoic acid and its methyl ester enantiomers as new antioxidants and enzyme inhibitors
作者:Hatice Baspinar Kücük、Ayşe Yusufoğlu
DOI:10.1007/s00706-012-0917-z
日期:2013.7
conversion of the substrate. Methyl (S)-3-hydroxytetradecanoate, which is the unreacted enantiomer of the racemic substrate, could be recovered with 98 % ee after 7 h resolution with a substrate/lipase weight ratio of 1:1 and 60 % conversion. (R)-3-Hydroxytetradecanoic acid was converted to its ester and the S methyl ester to its acid. This biocatalytic enantioselective resolution in aqueous medium
摘要通过猪胰脂肪酶催化3-羟基十四烷酸外消旋甲基酯在水介质中的水解,合成了3-羟基十四烷酸及其甲酯的光学纯的R和S对映异构体,目的是测定它们的抗氧化,抗弹性蛋白酶和抗脲酶活性。研究了底物/脂肪酶的重量比和反应时间的影响。确定了最佳反应条件。与猪胰脂肪酶的拆分反应提供了(R)-3-羟基十四烷酸,它是细菌重要脂质A的成分,与底物/脂肪酶孵育7小时后,其对映体比率(> 900)的ee大于99%ee重量比为3:1,基材的转化率为43%。甲基(外消旋底物的未反应对映异构体S)-3-羟基十四烷酸酯在分离7小时后,底物/脂肪酶的重量比为1:1,转化率为60%,可以以98%ee回收。将(R)-3-羟基十四烷酸转化成其酯,将S甲基酯转化成其酸。在水性介质中的这种生物催化对映选择性拆分为合成3-羟基十四烷酸及其甲酯的R和S对映异构体提供了一种环境友好的绿色化学方法。 图形概要