95310-88-6Relevant articles and documents
Enzymatic synthesis of a key intermediate for rosuvastatin by nitrilase-catalyzed hydrolysis of ethyl (R)-4-cyano-3-hydroxybutyate at high substrate concentration
Yao, Peiyuan,Li, Jianjiong,Yuan, Jing,Han, Chao,Liu, Xiangtao,Feng, Jinhui,Wu, Qiaqing,Zhu, Dunming
, p. 271 - 275 (2015)
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 of 1.5 molL-1 (235.5 gL-1) substrate concentration and 6.0 wt% loading of wet cells at pH 8.0 and 25 °C, with 100% conversion obtained in 4.5 h. Furthermore, immobilization of the whole cells enhanced their substrate tolerance, stability, and reusability. Under the optimized conditions (100 mmolL-1 tris(hydroxymethyl) aminomethane hydrochloride buffer, pH 8.0, 25 °C), the immobilized biocatalyst could be reused for up to 16 batches, with a biocatalyst productivity of 55.6 ggwet cells-1 and a spacetime productivity of 625.5 gL-1 d-1. These results demonstrated that the immobilized whole cells might be used as a biocatalyst in the industrial production of ethyl (R)-3-hydroxyglutarate, a key intermediate for the synthesis of rosuvastatin.
Efficient biosynthesis of ethyl (R)-3-hydroxyglutarate through a one-pot bienzymatic cascade of halohydrin dehalogenase and nitrilase
Yao, Peiyuan,Wang, Lei,Yuan, Jing,Cheng, Lihua,Jia, Rongrong,Xie, Meixian,Feng, Jinhui,Wang, Min,Wu, Qiaqing,Zhu, Dunming
, p. 1438 - 1444 (2015/06/30)
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 halohydrin dehalogenase gene from Agrobacterium radiobacter AD1 and a nitrilase gene from Arabidopsis thaliana. The activity of nitrilase was inhibited by high concentration of ECHB and NaCN. Consequently, the one-pot one-step process was implemented by fed-batch of ECHB and NaCN with high accumulative product concentration (up to 0.9 mol L-1). The biotransformation of ECHB to EHG was successfully achieved at 1.2 mol L-1 substrate concentration by a one-pot two-step process. As such, this one-pot bienzymatic transformation should be useful in synthesizing these important optical pure β-hydroxycarboxylic acids.
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
Gopalan,Sih
, p. 5235 - 5238 (2007/10/02)
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.