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
复制标题
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
中科院分区:
文献类型:
--
作者:
Susanne Leuchs;Shukrallah Na'amnieh;Lasse Greiner
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.
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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
通讯作者:
L. Greiner
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
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
影响因子:
5.4
作者:
Eckstein, Marrit F.;Peters, Martina;Greiner, Lasse
通讯作者:
Greiner, Lasse
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
期刊:
影响因子:
--
作者:
U. Kragl;Durda Vasic;C. Wandrey
通讯作者:
C. Wandrey