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Chapter 16 Toward Green Processes for Fine Chemicals Synthesis: Biocatalysis in Ionic Liquid-Supercritical Carbon Dioxide Biphasic Systems

机译:第十六章:精细化学品合成的绿色过程:离子液体-超临界二氧化碳双相系统中的生物催化

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摘要

Enzymatic transformations in ionic liquids (ILs)/supercritical carbon dioxide (scCO_2) biphasic systems, whereby enzyme molecules are "immobilized" in the IL phase and substrates/products are transported by the scCO_2 phase, are described as a way for carrying out clean synthetic chemical processes to produce pure products, being. Task-specific ionic liquids (TSILs), based on quaternary ammonium cations, with functional side chains (trimethylydroxylpropyl-, trimethylbutyronitryl-, trimethylhexylonitryl-, trimethylbutyl-and trimethylhexyl-), associated with the same anion (bis(trifluoromethane)sulfonylamide), were assayed for Candida antarctica lipase B (CALB)-catalyzed ester synthesis in IL/scCO_2 biphasic systems. The suitability of these ILs was established from both the activity and stability of the enzyme, including the maintenance of the secondary structure of the protein using circular dichroism spectroscopy. The mass-transfer phenomena between IL/scCO_2 phases were found to be key parameters for the efficient design of synthetic processes in these systems.
机译:离子液体(ILs)/超临界二氧化碳(scCO_2)两相系统中的酶促转化被描述为进行清洁合成的一种方法,其中酶分子被“固定”在IL相中,而底物/产物被scCO_2相转运。化学过程生产纯净的产品。具有季铵盐阳离子且具有功能性侧链(三甲基羟丙基丙基,三甲基丁腈,三甲基己腈,三甲基丁基和三甲基己基)的与特定阴离子(双(三氟甲烷)磺酰胺)缔合的特定任务离子液体(TSIL)在IL / scCO_2双相系统中检测了南极假丝酵母脂肪酶B(CALB)催化的酯合成。这些IL的适用性是由酶的活性和稳定性(包括使用圆二色光谱法维护蛋白质的二级结构)确定的。发现在IL / scCO_2相之间的传质现象是有效设计这些系统中合成过程的关键参数。

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  • 来源
    《Ionic liquids in organic synthesis》|2004年|209-223|共15页
  • 会议地点 Philadelphia PA(US);Philadelphia PA(US)
  • 作者单位

    Dipartamento de Bioquimica y Biologfa Molecular B e Inmunologia, Facultad de Quimica, Universidad de Murcia, P.O. Box 4021, E-30100 Murcia, Spain;

    Dipartamento de Bioquimica y Biologfa Molecular B e Inmunologia, Facultad de Quimica, Universidad de Murcia, P.O. Box 4021, E-30100 Murcia, Spain;

    Universite de Rennes-1, Institut de Chimie, UMR CNRS 6510, Campus de Beaulieu. Av. General Leclerc, 35042, Rennes, France;

    Universite de Rennes-1, Institut de Chimie, UMR CNRS 6510, Campus de Beaulieu. Av. General Leclerc, 35042, Rennes, France;

    Dipartamento de Bioquimica y Biologfa Molecular B e Inmunologia, Facultad de Quimica, Universidad de Murcia, P.O. Box 4021, E-30100 Murcia, Spain;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 基本有机化学工业;
  • 关键词

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