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Schiff base complex conjugates of bovine serum albumin as artificial metalloenzymes for eco-friendly enantioselective sulfoxidation

机译:牛血清白蛋白作为人工金属酶,用于生态辅助致力化亚砜的席夫基础复合物

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摘要

Artificial metalloenzymes (BSA-ML) have been prepared by non-covalent insertion of transition metal Schiff-base complexes, ML (L = 2-hydroxynaphthalen-1-naphthaldehyde and 3,4-diaminobenzenesulfonic acid; M = Co, Mn, V, Fe, Cr), into bovine serum albumin (BSA) as the host protein and were characterized by UV-visible spectroscopy, ESI-TOF mass spectrometry and molecular docking studies. The catalytic activities of the BSA-ML in the selective oxidation of various prochiral sulfides in aqueous media, using H2O2 as oxidant, have been evaluated. During the optimization process, pH and the concentrations of catalyst and oxidant were found to have a remarkable influence on both yield and enantioselectivity. In certain cases, BSA-ML gave satisfactory results in the oxidation of organic sulfides to sulfoxides (up to 100% conversion, 100% chemoselectivity, 96% ee and 500 h(-1) turnover frequency).
机译:通过非共价插入过渡金属席夫碱基配合物,ML(L = 2-羟基萘-1-萘二甲酯和3,4-二氨基苯磺酸; M = CO,MN,V的,制备人造金属键(BSA-ML)。 Fe,Cr)作为牛蛋白(BSA)作为宿主蛋白,其特征在于UV可见光谱,ESI-TOF质谱和分子对接研究。 已经评估了使用H 2 O 2作为氧化剂在水性介质中各种胰硫化硫化物的各种胰硫化物的选择性氧化的催化活性。 在优化过程中,发现pH和催化剂和氧化剂的浓度对产率和对映选择性具有显着影响。 在某些情况下,BSA-ML使得令人满意的导致有机硫化物氧化与亚砜(最高100%转化,100%化学胶合剂,96%EE和500H(-1)周转频率)。

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  • 来源
    《RSC Advances》 |2018年第71期|共11页
  • 作者单位

    Guangxi Univ Nationalities Sch Chem &

    Chem Engn Key Lab Chem &

    Engn Forest Prod Nanning 530008 Peoples R China;

    Guangxi Normal Univ Sch Pharm &

    Chem State Key Lab Chem &

    Mol Engn Med Resources Guilin 541004 Peoples R China;

    Guangxi Normal Univ Sch Pharm &

    Chem State Key Lab Chem &

    Mol Engn Med Resources Guilin 541004 Peoples R China;

    Guangxi Univ Nationalities Sch Chem &

    Chem Engn Key Lab Chem &

    Engn Forest Prod Nanning 530008 Peoples R China;

    Guilin Normal Coll Guilin 541001 Peoples R China;

    Guangxi Normal Univ Sch Pharm &

    Chem State Key Lab Chem &

    Mol Engn Med Resources Guilin 541004 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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