[EN] AN IMPROVED PROCESS FOR THE PREPARATION OF PREGABALIN<br/>[FR] PROCÉDÉ AMÉLIORÉ POUR LA PRÉPARATION DE PRÉGABALINE
申请人:HIKAL LTD
公开号:WO2021105742A1
公开(公告)日:2021-06-03
The present invention relates to an improved process for the preparation of Pregabalin (I), which is simple, economical, efficient, and environment friendly, commercially viable with chemical and chiral purity at least 99.95%.
[EN] GREENER AND ECONOMIC PROCESS FOR PREPARATION OF PREGABALIN<br/>[FR] PROCÉDÉ ÉCOLOGIQUE ET ÉCONOMIQUE POUR LA PRÉPARATION DE PRÉGABALINE
申请人:HIKAL LTD
公开号:WO2020183376A1
公开(公告)日:2020-09-17
The present invention relates to an economical, enzyme catalyzed and commercially viable greener process for manufacturing Pregabalin of formula (I) in high yield with highchemical and chiral purity.
chemoenzymatic route has been developed for the synthesis of optically active pregabalin (PGB) from isobutylsuccinonitrile (IBSN). (S)-3-cyano-5-methylhexanoic acid ((S)-CMHA), a critical chiral intermediate of PGB, was synthesized using regio- and enantioselective hydrolysis of IBSN by immobilized Escherichia coli cells harboring nitrilase BrNIT from Brassica rapa. The catalytic performances of immobilized
已经开发了一种有效的化学酶法路线,用于从异丁基琥珀腈(IBSN)合成旋光普瑞巴林(PGB)。(S)-3-氰基-5-甲基己酸((S)-CMHA)是PGB的关键手性中间体,是利用固定和携带IBSN的固定化大肠杆菌细胞,其中IBSN的手性和对映选择性水解带有芥菜腈酶Br NIT 。对固定化细胞的催化性能进行了研究,经过12批反应后,固定化细胞在100 g / L的底物负载下获得了高对映选择性(E > 150)和底物转化率(> 41.1%)。未反应(R-IBSN通过外消旋化以94.5%的高收率再循环,并且将所得的(S)-CMHA直接氢化成所需的PGB,其具有99.6%的高纯度和99.4%的光学纯度。经证明,该化学酶促途径的原料和E因子的输入量远低于用于PGB合成的第一代和第二代途径的原料和E因子。
Stereoselective bioconversion of aliphatic dinitriles into cyano carboxylic acids
申请人:Burns P. Michael
公开号:US20070196905A1
公开(公告)日:2007-08-23
The present invention is directed to a regio- and stereoselective bioconversion of selected aliphatic dinitriles into corresponding cyanocarboxylic acids. More particularly, the present invention provides methods for the conversion of 2-isobutyl-succinonitrile into (S)-3 cyano-5-methylhexanoic acid, which is a useful intermediate in the synthesis of (S)-3(aminomethyl)-5-methylhexanoic acid (pregabalin). Pregabalin can be used for treating certain cerebral diseases, for example, in the treatment and prevention of seizure disorders, pain, and psychotic disorders.