Enantioselective reduction of sparingly water-soluble ketones: continuous process and recycle of the aqueous buffer system

Enantioselective reduction of sparingly water-soluble ketones: continuous process and recycle of the aqueous buffer system
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难溶于水的酮的对映选择性还原:水性缓冲系统的连续处理和回收

DOI:
10.1039/c2gc36558h
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发表时间:
2013
期刊:
影响因子:
9.8
通讯作者:
Lasse Greiner
Lasse Greiner
中科院分区:
化学1区
文献类型:
--
作者:
Susanne Leuchs;Shukrallah Na'amnieh;Lasse Greiner

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原料和产物在水中的溶解度低和酶的利用率低是醇脱氢酶生产对映体长链醇的两个主要障碍。一系列技术被用来克服这些限制。以前发现的一种离子液体被用作洗涤剂,以增加原料和产品的低溶解度。在酶膜反应器中采用超滤技术,提高了低酶利用率。以短乳杆菌乙醇脱氢酶和芽孢杆菌葡萄糖脱氢酶的动力学性质和稳定性数据为基础,对短链乳杆菌乙醇脱氢酶和芽孢杆菌葡萄糖脱氢酶进行了研究。分别用于酮还原和辅因子再生,实现了一个连续的过程。在两个酶膜反应器串联的结构中,该过程可演示1000h以上,循环次数大于106h,时空产率高达34g L−1d−1,对映体选择性为99.9%。此外,还包括通过吸附醇类进行的下游加工,允许90%的含水缓冲液回收。因此,E因子(每种产品的废料量)减少到13。
Low solubility of starting materials and products in water and low enzyme utilisation are the two main obstacles for the production of enantiopure long-chain alcohols with alcohol dehydrogenases. A combination of techniques was used to overcome these limitations. A previously identified ionic liquid was used as a detergent to increase the low solubility for the starting materials as well as for the products. The low enzyme utilisation was increased by using ultrafiltration in an enzyme membrane reactor. Based on kinetic characterisation and stability data of the alcohol dehydrogenase from Lactobacillus brevis and glucose dehydrogenase from Bacillus sp. used for ketone reduction and cofactor regeneration, respectively, a continuous process was realised. In a configuration of a cascade of two enzyme membrane reactors the process could be demonstrated for more than 1000 hours with turnover numbers of more than 106 and space time yields of up to 34 g L−1 d−1 with 99.9% enantioselectivity. Furthermore, downstream processing via adsorption of the alcohols was included, allowing 90% recycle of the aqueous buffer. Thus, the E-factor (amount of waste stream per product) was reduced to 13.
DOI: --
发表时间: 2013
期刊:
影响因子: --
作者:
S. Leuchs;Thomas Nonnen;Dominique Dechambre;Shukrallah Na’amnieh;L. Greiner
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DOI: --
发表时间: 2006
期刊:
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作者:
Marrit Eckstein;J. Lembrecht;J. Schumacher;W. Eberhard;A. Spiess;M. Peters;Christoph Roosen;L. Greiner;W. Leitner;U. Kragl
通讯作者: U. Kragl
DOI: 10.1002/adsc.200606079
发表时间: 2006-08-01
影响因子: 5.4
作者:
Eckstein, Marrit F.;Peters, Martina;Greiner, Lasse
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酮的连续均相不对称转移氢化:动力学的教训。
DOI: 10.1002/chem.200500675
发表时间: 2006
期刊: Chemistry
影响因子: --
作者:
L. Greiner;Stephan Laue;A. Liese;C. Wandrey
通讯作者: C. Wandrey
DOI: --
发表时间: 1992
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作者:
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