Die vorliegende Erfindung betrifft eine NADPH abhängige Oxidoreduktase, die aus Lactobacilli erhältlich ist, ein enzymatisches Verfahren zur enantioselektiven Reduktion von 2-Oxosäureestern zu den entsprechenden chiralen S-2-Hydroxysäureestern und ein enzymatisches Verfahren zur enantioselektiven Gewinnung von S-2-Hydroxysäureestern mit enzymgekoppelter Coenzymregenerierung.
Candida carbonyl reductase and method for preparing (R)-lipoic acid precursor
申请人:East China University of Science and Technology
公开号:US10294479B2
公开(公告)日:2019-05-21
Disclosed herein is Candida parapsilosis CGMCC 9630, the carbonyl reductase expressed by said strain and the encoding gene and amino acid sequence thereof, the recombinant expression vector and recombinant expression transformant containing said gene sequence, and use of whole cells of Candida parapsilosis, carbonyl reductase or corresponding recombinant transformant thereof as catalyst in catalyzing asymmetric reduction of prochiral carbonyl compounds, particularly reduction of 6-carbonyl-8-halogenocaprylate to prepare the synthetic precursor of (R)-α-lipoic acid, (R)-6-hydroxy-8-halogenocaprylate. In comparison to other methods of asymmetric reduction for preparing (R)-6-hydroxy-8-halogenocaprylate, the disclosure has advantages of high substrate concentration, mild reaction conditions, environmental friendship, high yield, and high optical purity of the product, and thus has good prospect in industrial production of (R)-α-α-lipoic acid.
Method for the enantioselective reduction of 8-chloro-6-oxo-octanoic acid alkyl esters
申请人:——
公开号:US20030180896A1
公开(公告)日:2003-09-25
The invention relates to a process for the production of (R)- or (S)-8-chloro-6-hydroxyoctanoic acid alkyl esters of the general formula (R)-II or (S)-II,
1
in which R means C
1-4
alkyl, from 8-chloro-6-oxo-octanoic acid alkyl esters of the general formula I,
2
in which R has the above meaning.
The desired enantiomers are produced biocatalytically in an enantioselective reduction, wherein as desired the strains Mucor racemosus are used for (S)-II compounds and Geotrichum candidum for (R)-II compounds.
The resultant esters may, in known manner, be converted stereospecifically into (R)-&agr;-lipoic acid.
本发明涉及通式为(R)-II或(S)-II的(R)-或(S)-8-氯-6-羟基辛酸烷基酯的生产工艺、
1
其中 R 指 C
1-4
烷基,来自通式 I 的 8-氯-6-氧代辛酸烷基酯、
2
其中 R 具有上述含义。
所需的对映体是在对映体选择性还原中通过生物催化产生的,其中(S)-II 化合物使用 Mucor racemosus 菌株,(R)-II 化合物使用 Geotrichum candidum 菌株。
所得酯类可按已知方式立体定向转化为 (R)-&agr;-lipoic acid。
Method for the production of (r)-and (s)-8-chloro-6-hydroxy-octanic acid alkyl esters by enzymatic reduction
申请人:Muller Michael
公开号:US20050032180A1
公开(公告)日:2005-02-10
The invention relates to a method for the production of (R)- or (S)-8-chloro-6-hydroxyoctanoic acid alkyl esters of the general formula (R)-II or (S)-II
in which R has the meaning C
1-4
-alkyl, from 8-chloro-6-oxooctanoic acid alkyl esters of the general formula I
in which R has the above meaning, by enzymatic reduction using alcohol dehydrogenases, such as
Lactobacillus brevis
or
Thermoanaerobium brokii
, in the presence of cofactor regeneration systems.
The resulting (R)- and (S)-8-chloro-6-hydroxyoctanoic acid esters can be converted in a known manner into (R)-α-lipoic acid and (S)-α-lipoic acid, respectively.
本发明涉及一种生产通式为(R)-II或(S)-II的(R)-或(S)-8-氯-6-羟基辛酸烷基酯的方法。
其中 R 的含义为 C
1-4
-烷基,由通式 I 的 8-氯-6-氧代辛酸烷基酯组成
其中 R 具有上述含义,通过使用醇脱氢酶进行酶还原,如
乳酸杆菌
或
酵母菌
在辅因子再生系统存在的情况下进行酶还原。
得到的(R)-和(S)-8-氯-6-羟基辛酸酯可按已知方式分别转化为(R)-α-硫辛酸和(S)-α-硫辛酸。
Oxidoreductase
申请人:Bobkova Maria
公开号:US20050191735A1
公开(公告)日:2005-09-01
The present invention relates to an NADPH-dependent oxidoreductase available from
Lactobacilli
, to an enzymic method for enantioselective reduction of 2-oxo acid esters to the corresponding chiral S-2-hydroxy acid esters and to an enzymic method of enantioselectively obtaining S-2-hydroxy acid esters by enzyme-coupled coenzyme regeneration.