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Two new chiral dinuclear Mn(III)‐Salen complexes with inherent phase‐transfer capability have been synthesized, which serve as catalysts in the asymmetric epoxidation of nonfunctionalized alkenes. Experimental results show these complexes are effective catalysts for the asymmetric epoxidation of some cyclic alkenes and the catalysts have certain inherent phase‐transfer capability during the epoxidation...
Ionic liquids (ILs) have been widely used as reaction solvents in asymmetric synthesis due to their interesting physical and chemical properties. However, monitoring reactant‐to‐product conversion and the enantiopurity of formed stereoisomers often involves a tedious extraction step before chromatographic analysis. In this study, a rapid and sensitive sampling method using headspace solid‐phase microextraction...
Aggregation of amphotericin B (AmB) in an ionic liquid‐rich environment was investigated using circular dichroism (CD) spectroscopy. It was found that nature of the ionic liquids’ anion had a strong impact not only on the aggregation of AmB, but more importantly on the nature of AmB aggregates, as observed in the asymmetry of the exciton couplet of the aggregate in CD spectra. Unique CD signals for...
In this study, simple electrophoretic methods were developed for the chiral separation of the clinically important compounds fucose and pipecolic acid. In recent years, these analytes, and particularly their individual enantiomers, have attracted considerable attention due to their role in biological functions and disorders. The detectability and sensitivity of pipecolic acid and fucose were improved...
Chiral ionic liquids (ILs) have drawn more and more attention in separation science; however, only a few papers focused on the application of chiral ILs as chiral ligands in LE‐CE. In this article, a novel amino acid ionic liquid (AAIL), tetramethylammonium L‐hydroxyproline ([TMA][L‐OH‐Pro]), was first applied as a chiral ligand to evaluate its enantioselectivity towards several aromatic amino acids...
Much attention has been paid to chiral ionic liquids (ILs) in analytical chemistry, especially its application in capillary electrophoresis (CE) enantioseparation. However, the investigation of chiral ionic liquids synergistic systems based on antibiotic chiral selectors has been reported in only one article. In this work, a novel chiral ionic liquid, tetramethylammonium‐L‐hydroxyproline (TMA‐L‐Hyp),...
The application of ionic liquids as solvents for transesterification of prochiral pirymidine acyclonucleoside using lipase (EC 3.1.1.3) Amano PS from Burkholderia cepacia (BCL) is reported. The effect of using medium reaction, acyl group donor, and temperature on the activity and enantioselectivity of BCL was studied. From the investigated ionic solvents, the hydrophobic ionic liquid [BMIM]PF6] was...
As one kind of functionalized green medium, chiral ionic liquids (CILs) have been widely applied in fields of asymmetric catalysis, enantioseparation, and so on. In this study, four kinds of amino acid–based CILs were synthesized by using trimethylamine, N‐methylpyrrolidine, N‐methylimidazole, and tropine as cationic nucleus, respectively. Then their specific optical rotation and solubility in common...
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