An effective one‐pot bienzymatic synthesis of ethyl (R)‐3‐hydroxyglutarate (EHG) from ethyl (S)‐4‐chloro‐3‐hydroxybutyrate (ECHB) was achieved by using recombinant Escherichia coli cells expressing separately or co‐expressing a mutant halohydrindehalogenase gene from Agrobacterium radiobacter AD1 and a nitrilase gene from Arabidopsis thaliana. The activity of nitrilase was inhibited by high concentration
一个有效的单釜bienzymatic乙基的合成(- [R选自乙基()-3-羟基戊二酸(EHG)小号)-4-氯-3-羟基丁酸酯(ECHB)通过使用重组实现大肠杆菌分别表达细胞或共表达突变的卤代醇脱卤酶基因从根癌农杆菌AD1和腈水解酶基因拟南芥(Arabidopsis thaliana)。高浓度的ECHB和NaCN抑制了腈水解酶的活性。因此,通过批量添加高浓度(最高至0.9 mol L -1)的ECHB和NaCN进行分批实施一锅法。在1.2 mol L -1下成功实现了ECHB到EHG的生物转化一锅两步法浓缩底物。因此,这种一锅双酶转化应可用于合成这些重要的光学纯β-羟基羧酸。
Bifunctional chiral synthons via biochemical methods. 5. Preparation of (S)-ethyl hydrogen-3-hydroxyglutarate, key intermediate to (R)-4-amino-3-hydroxybutyric acid and L-carnitine.
作者:Aravamudan S. Gopalan、Charles J. Sih
DOI:10.1016/s0040-4039(01)81572-0
日期:——
Microbial enantioselective hydrolysis of diethyl-3-hydroxyglutarate afforded (S)-ethyl hydrogen-3-hydroxyglutarate, which was transformed into (R)-4-amino-3-hydroxybutyric acid and L-carnitine, via a Curtius and Hunsdiecker rearrangement, respectively.
Enzymatic Synthesis of a Key Intermediate for Rosuvastatin by Nitrilase-Catalyzed Hydrolysis of Ethyl (<i>R</i>)-4-Cyano-3-hydroxybutyate at High Substrate Concentration
An enzymatic method for the synthesis of ethyl (R)‐3‐hydroxyglutarate from ethyl (R)‐4‐cyano‐3‐hydroxybutyate was developed by using free and immobilized recombinant Escherichia coli BL21(DE3)pLysS harboring a nitrilase gene from Arabidopsis thaliana (AtNIT2). The hydrolysis of ethyl (R)‐4‐cyano‐3‐hydroxybutyate proceeded with the freely suspended cells of the biocatalyst under the optimized conditions
通过使用携带拟南芥腈水解酶基因的游离且固定化的重组大肠杆菌BL21(DE3)pLysS ,开发了一种从(R)-4-氰基-3-羟基丁酸乙酯中合成(R)-3-羟基戊二酸乙酯的酶促方法。(AtNIT2)。在优化的1.5 mol L -1(235.5 g L -1)条件下,(R)-4-氰基-3-羟基丁酸乙酯的水解与生物催化剂的自由悬浮细胞一起进行)的底物浓度和在pH 8.0和25°C下湿电池的6.0 wt%负载,在4.5小时内获得100%的转化率。此外,整个细胞的固定化增强了其底物耐受性,稳定性和可重复使用性。在最佳条件下(100 mmol L -1三(羟甲基)氨基甲烷盐酸盐缓冲液,pH 8.0,25°C),固定化的生物催化剂最多可重复使用16批,生物催化剂的生产率为55.6 g g湿室-1和时空生产率为625.5 g L -1 d -1。这些结果表明,固定化的全细胞可能被用作工业生产乙基的生物
Verfahren zur enantioselektiven Herstellung von 3-Hydroxyglutarsäuremonoestern und deren Verwendung
申请人:SANDOZ AG
公开号:EP2778229A1
公开(公告)日:2014-09-17
Die Erfindung betrifft ein Verfahren zur enantioselektiven Herstellung von 3-Hydroxyglutarsäureestern der Formel 1
mit R1 = Alkyl, Aryl, oder substituiertes Alkyl, sowie der Verwendung dieser Verbindungen 1 in der Synthese.
[EN] PROCESS FOR ENANTIOSELECTIVE SYNTHESIS OF 3-HYDROXY-GLUTARIC ACID MONOESTERS AND USE THEREOF<br/>[FR] PROCÉDÉ DE SYNTHÈSE ÉNANTIOSÉLECTIVE DE MONOESTERS DE L'ACIDE 3-HYDROXY-GLUTARIQUE ET UTILISATION
申请人:SANDOZ AG
公开号:WO2014140006A1
公开(公告)日:2014-09-18
The present invention relates to a process for the enzymatic enantioselective synthesis of 3-hydroxy- glutaric acid esters of formula 1 with R 1being alkyl, aryl, or substituted alkyl, as well as the use compounds of formula 1 in the synthesis.