Novel AC regioisomer cationic cyclodextrins have been successfully prepared with azide/alkyne click chemistry. The clicked CDs were explored for the enantioseparation of acidic racemates in capillary electrophoresis.
Direct Resolution of Optically Active Isomers on Chiral Packings Containing Ergoline Skeletons. 5. Enantioseparation of Amino Acid Derivatives
作者:A. Messina、A. M. Girelli、M. Flieger、M. Sinibaldi、P. Sedmera、L. Cvak
DOI:10.1021/ac950698c
日期:1996.4.1
alkaloid-based chiral stationary phase preparation is described. Synthesis is based on bonding the allyl derivative of terguride to mercaptopropylsilanized silica gel. The packing exhibits higher content of chiral selector, stability, reproducibility, and enantioselectivity toward amino acids compared to that previously studied. The chromatographic behavior of amino acids with different side chains and substituent
A new chiral ligand exchange capillary electrophoresis system based on Zn(<scp>ii</scp>)–<scp>l</scp>-leucine complexes coordinating with β-cyclodextrin and its application in screening tyrosinase inhibitors
作者:Yuan Su、Xiaoyu Mu、Li Qi
DOI:10.1039/c4ra09433f
日期:——
hyper pigmentation in animals and enzymatic browning in food. Thus, it is of great significance to screen inhibitors of tyrosinase. In this work, a new chiral ligand exchange-capillary electrophoresis (CLE-CE) system based on the coordination effect of Zn(II)–L-leucine complexes and β-cyclodextrin (β-CD) was developed for screening the inhibitors of tyrosinase. The effects of the concentration of β-CD
酪氨酸酶在黑色素形成中起关键作用,并且与动物体内的色素沉着过多和食物中的酶促褐变密切相关。因此,筛选酪氨酸酶抑制剂具有重要意义。在这项工作中,基于Zn(II)-L-亮氨酸复合物和β-环糊精(β-CD)的协同作用,开发了一种新的手性配体交换-毛细管电泳(CLE-CE)系统,用于筛选酪氨酸酶抑制剂。β-CD的浓度的影响,缓冲液pH的比值,大号-亮氨酸对于Zn(II),并用DNS-复杂浓度进行了调查d,大号-酪氨酸,DNS- d,大号-缬氨酸和DNS- d,L-苯丙氨酸作为被测分析物。最佳的缓冲条件包括pH值为8.2的100.0 mM硼酸,5.0 mM乙酸铵,3.0 mM Zn(II),6.0 mM L-亮氨酸和4.0 mMβ-CD。已经发现六对Dns- D,L -AA可以被基线分离,并且五对Dns- D,L- AA被部分地对映分离。然后对L-酪氨酸进行了定量分析,并以12.95μM至413.3μM的浓度获得了良好的线性(r
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
transfer)-type read-outmodecan be devised to analyze the enzymatic hydrolysis-triggered redistribution of the probe between the nanospace and the nanofiber to accomplish a more clearly distinguished enzyme assay. Thus, it is clear that threedistinctread-outmodes, that is, 1) fluorogenic substrates, 2) substrates bearing an environmentally sensitive probe, or 3) a substrate exhibiting FRET, canoperate under