phenylcarbamate cyclodextrin (CD) clicked chiral stationary phases (CSPs). A comparison study is herein reported for per(4‐chloro‐3‐methyl)phenylcarbamate and per(2‐chloro‐5‐methyl)phenylcarbamate β‐CD clicked CSPs (i.e., CCC4M3‐CSP and CCC2M5‐CSP). The enantioselectivity dependence on column temperature was studied in both normal‐phase and reversed‐phase mode high performance liquid chromatography
Preparation and evaluation of a triazole‐bridged
<i>bis</i>
(β‐cyclodextrin)–bonded chiral stationary phase for HPLC
作者:Yazhou Shuang、Yuqin Liao、Hui Wang、Yuanxing Wang、Laisheng Li
DOI:10.1002/chir.23147
日期:2020.2
spectroscopy, massspectrometry, elemental analysis, and thermogravimetric analysis. The chiral performance of TBCDP was evaluated by using chiral pesticides and drugs as probes including triazoles, flavanones, dansyl amino acids and β‐blockers. Some effects of the composition in mobile phase and pH value on the enantioseparations were investigated in different modes. The nine triazoles, eight flavanones, and
A cationic cyclodextrin clicked bilayer chiral stationary phase for versatile chiral separation in HPLC
作者:Jie Zhou、Bo Yang、Jian Tang、Weihua Tang
DOI:10.1039/c7nj04960a
日期:——
functionality-enhanced chiral selectivity was elucidated in different elution modes. Higher chiral resolutions were shown in the RP-elution mode due to the inclusion complexation in comparison to the NP-elution mode. The highest chiral resolution of 4.40 was achieved for 4ClPh-OPr, with 12 racemic pairs baseline separated in RP-HPLC. The addition of organic modifiers in mobile phases plays an important role
Preparation of a novel bridged bis(β-cyclodextrin) chiral stationary phase by thiol–ene click chemistry for enhanced enantioseparation in HPLC
作者:Ning Zhang、Siyu Guo、Bolin Gong
DOI:10.1039/d1ra04697g
日期:——
resonance (1H NMR), solid state 13C nuclear magnetic resonance (13C NMR) spectra spectrum, scanning electron microscope, elemental analysis, massspectrometry, infrared spectrometry and thermogravimetric analysis. The performance of HTCDP in enantioseparation was systematically examined by separating 21 chiral compounds, including 8 flavanones, 8 triazole pesticides and 5 other common chiral drugs (benzoin
An antibacterial agent comprising a compound represented by the following general formula (I), which can exhibit potent antibacterial activity against bacteria that have acquired resistance to quinolones (in the formula, R
1
and R
4
represents hydrogen atom, hydroxyl group, or a lower alkoxy group; R
2
and R
3
represents hydrogen atom or hydroxyl group; W represents hydrogen atom, a lower cyclic alkyl group, or a lower alkoxy group; R
1′
and R
5′
represents hydrogen atom; R
2′
and R
3′
represents hydrogen atom, hydroxyl group, or a lower alkoxy group; and R
4′
represents hydrogen atom or hydroxyl group).