Efficient synthesis of an ε-hydroxy ester in a space–time yield of 1580gL−1d−1 by a newly identified reductase RhCR
摘要:
A new NADH-dependent carbonyl reductase RhCR capable of efficiently reducing the epsilon-ketoester ethyl 8-chloro-6-oxooctanoate (ECOO) to give ethyl (S)-8-chloro-6-hydroxyoctanoate [(S)-ECHO], an important chiral precursor for the synthesis of (R)-alpha-lipoic acid, was identified from Rhodococcus sp. ECU1014. Using recombinant Escherichia coli cells expressing RhCR and glucose dehydrogenase used for the regeneration of cofactor, 440 g L-1 (2 M) of ECOO were stoichiometrically converted to (S)-ECHO in a space-time yield of 1580 g L-1 d(-1) without the external addition of any expensive cofactor. (C) 2014 Elsevier Ltd. All rights reserved.
chiral precursor for the synthesis of the side chain pharmacophore of cholesterol-lowering drug atorvastatin. Herein, a robust carbonyl reductase (LbCR) was newly identified from Lactobacillus brevis, which displays high activity and excellent diastereoselectivity toward bulky t-butyl 6-cyano-(5R)-hydroxy-3-oxo-hexanoate (7). The engineered Escherichiacoli cells harboring LbCR and glucose dehydrogenase
叔丁基-6-氰基-(3 R,5 R)-二羟基己酸酯是一种先进的手性前体,用于合成降胆固醇药物阿托伐他汀的侧链药效团。在本文中,从短乳杆菌中新鉴定出一种强健的羰基还原酶(Lb CR),它对高密度的叔丁基6-氰基-(5 R)-羟基-3-氧代己酸叔丁酯具有很高的活性和非对映选择性(7)。具有Lb CR和葡萄糖脱氢酶(用于辅因子再生)的工程化大肠杆菌细胞被用作生物催化剂,用于不对称还原底物7。结果,多达300 g L –1的水不溶性底物以351 g L –1 d –1的时空产率被完全转化为相应的手性二元醇,de > 99.5%de,表明了巨大的潜力的Lb的CR对非常笨重和实际合成双向的畅销他汀类药物-手性3,5-二羟基羧酸侧链。
Process For the Enantioselective Enzymatic Reduction of Keto Compounds
申请人:Gupta Antje
公开号:US20080233619A1
公开(公告)日:2008-09-25
The present invention relates to a process for the enantioselective enzymatic reduction of keto compounds which is carried out in two phases and uses 4-methyl-2-pentanol, 5-methyl-2-hexanol and/or 2-heptanol for coenzyme regeneration.
Efficient synthesis of an ε-hydroxy ester in a space–time yield of 1580gL−1d−1 by a newly identified reductase RhCR
A new NADH-dependent carbonyl reductase RhCR capable of efficiently reducing the epsilon-ketoester ethyl 8-chloro-6-oxooctanoate (ECOO) to give ethyl (S)-8-chloro-6-hydroxyoctanoate [(S)-ECHO], an important chiral precursor for the synthesis of (R)-alpha-lipoic acid, was identified from Rhodococcus sp. ECU1014. Using recombinant Escherichia coli cells expressing RhCR and glucose dehydrogenase used for the regeneration of cofactor, 440 g L-1 (2 M) of ECOO were stoichiometrically converted to (S)-ECHO in a space-time yield of 1580 g L-1 d(-1) without the external addition of any expensive cofactor. (C) 2014 Elsevier Ltd. All rights reserved.