Improvement of the polyoxometalate's performance in the asymmetric oxidation of styrene via combined with chiral ionic liquid

Improvement of the polyoxometalate's performance in the asymmetric oxidation of styrene via combined with chiral ionic liquid
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与手性离子液体结合提高多金属氧酸盐在苯乙烯不对称氧化中的性能

DOI:
10.1016/j.catcom.2016.02.018
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发表时间:
2016-04
影响因子:
3.7
通讯作者:
Nan Sang
Nan Sang
中科院分区:
化学3区
文献类型:
--
作者:
Dong Liang;Na Zhu;Hailin Zhu;Zhiyong Hu;Duanlin Cao;Nan Sang

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将天然手性烟碱衍生的烷基溴季铵盐(C8、C12和C16)与聚氧乙烯酸酯(POM)简单结合,可提高POM在H2 O2氧化苯乙烯反应中的效率和对映选择性.结果表明,POM与CILs具有协同效应,反应1h后苯乙烯完全转化,对R-(-)-1-苯基乙烷-1,2-二醇的选择性较高,收率为72%,ee值为96%,CILs对R-比S-对映体具有更好的识别能力.
The efficiency and enantioselectivity of polyoxometalate (POM) in the oxidation of styrene with H2O2could be improved via simply combined the POM with the chiral ionic liquids (CILs), which consist of the quaternized alkyl bromide salts (with lengths of C-8, C-12, and C-16) derived from natural chiralS-nicotine. The hybrids showed synergistic advantages between POM and CILs, achieving a complete conversion of styrene after 1 h of mild reaction and a relatively high selectivity forR-(−)-1-phenylethane-1, 2-diol with 72% yield and 96% ee. Further fluorescence analysis illustrated that CILs might serve for the enantiomeric recognition ofR-thanS-enantiomers.
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