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Journal articles on the topic 'Chiralpak AD'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Zhang, Ping, Yuhan He, Sheng Wang, et al. "Chiral Separation and Determination of Etoxazole Enantiomers in Vegetables by Normal-Phase and Reverse-Phase High Performance Liquid Chromatography." Molecules 25, no. 14 (2020): 3134. http://dx.doi.org/10.3390/molecules25143134.

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The chiral separation of etoxazole enantiomers on Lux Cellulose-1, Lux Cellulose-3, Chiralpak IC, and Chiralpak AD chiral columns was carefully investigated by normal-phase high performance liquid chromatography and reverse-phase high performance liquid chromatography (HPLC). Hexane/isopropanol, hexane/n-butanol, methanol/water, and acetonitrile/water were used as mobile phase at a flow rate of 0.8 mL/min. The effects of chiral stationary phase, mobile phase component, mobile phase ratio, and temperature on etoxazole separation were also studied. Etoxazole enantiomers were baseline separated o

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2

R., Čižmáriková, Némethy A., Valentová J., Hroboňová K., and Adamcová K. "Synthesis of new compounds of the aryloxyaminopropanol type and their HPLC enantioseparation." Acta Facultatis Pharmaceuticae Universitatis Comenianae 60, no. 2 (2013): 37–42. http://dx.doi.org/10.2478/afpuc-2013-0023.

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Abstract This article describes a preparation of some new compounds of the aryloxyaminopropanol type derived from 4-hydroxyphenylpropan- 1-one with phenylamino, cyclohexylamino and isobutylamino group in the hydrophilic part and methoxymethyl or ethoxymethyl substituent in the lipophilic part of the molecule. The purity of the prepared compounds was checked by thinlayer chromatography and the structure was confirmed on the basis of interpretation of the IR, UV, 1H NMR and 13C NMR spectra. An enantioseparation of the prepared compounds was performed by using high-performance liquid chromatograp

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3

Zhang, Tao, Mengya Liao, Ye Tian, et al. "HPLC Determination of Enantiomeric Purity of Letermovir Based on CHIRALPAK AD." Journal of Chromatographic Science 54, no. 9 (2016): 1495–500. http://dx.doi.org/10.1093/chromsci/bmw042.

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4

QIU, GeBin, LeYi ZHENG, QuanZhen LV, JinBo ZHANG, Jun WEN, and ZhanYing HONG. "Enantiomeric separation of arotinolol by Chiralpak AD-H chiral column HPLC method." Pharmaceutical Care and Research 15, no. 5 (2015): 351–53. http://dx.doi.org/10.5428/pcar20150509.

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5

Ning, Jian G. "Direct chiral separation with Chiralpak AD converted to the reversed-phase mode." Journal of Chromatography A 805, no. 1-2 (1998): 309–14. http://dx.doi.org/10.1016/s0021-9673(98)00035-1.

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6

Kalíková, Květa, Radim Geryk, Jiří Vozka, and Eva Tesařová. "Evaluation of differences between Chiralpak IA and Chiralpak AD-RH amylose-based chiral stationary phases in reversed-phase high-performance liquid chromatography." Journal of Separation Science 38, no. 5 (2015): 711–19. http://dx.doi.org/10.1002/jssc.201401002.

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7

Čižmáriková, R., S. Chudáčiková, J. Valentová, and A. Némethy. "Synthesis and enantioseparation of derivatives of propranolol." Acta Facultatis Pharmaceuticae Universitatis Comenianae 59, no. 1 (2012): 5–13. http://dx.doi.org/10.2478/v10219-012-0012-x.

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Synthesis and enantioseparation of derivatives of propranololPropranolol is one of the first prepared and in therapeutic praxis used beta- adrenolytics. In this paper novel derivatives of propranolol with cyclohexylamino and pyrrolidin-1-yl groups in hydrophilic part were prepared. HPLC-enantioseparation propranolol (as reference compound) and of the prepared derivatives has been achieved using a Chiralpak AD CSP based on the amylose tris (3,5-dimethylphenylcarbamate).(R)-enantiomer of the propranolol was prepared by stereoselective synthesis using Jacobsen catalyst.

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8

Fang, Ying Ying, Xiao Ling Zha, Hui Li, and Wei Fang Yu. "Determination of Henry Constants of Azelnidipine Enantiomers on Chiralpak AD Column at Different Temperatures." Advanced Materials Research 1078 (December 2014): 78–81. http://dx.doi.org/10.4028/www.scientific.net/amr.1078.78.

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Simulated moving bed (SMB) chromatographic separation has become a highly promising method for chiral separation due to the less solvent consumption and efficient utilization of stationary phase. As reported, Azelnidipine exists two isomeric forms, it is necessary to product azelnidipine single enantiomer for medical safety and drug developmen. However, the separation of azelnidipine enantiomers on SMB is complex, requiring many operating parameters. And the SMB processes with temperature gradient (non-isotherm) mode may have significant advantages over the traditional isothermal mode. In this

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9

Wang, Fang, Thomas Dowling, Dean Ellison, and Jean Wyvratt. "Comparison study of Chiralpak AD-H with AD columns in chromatographic enantioseparation of dihydropyrimidinone acid and its methyl ester." Journal of Chromatography A 1034, no. 1-2 (2004): 117–23. http://dx.doi.org/10.1016/j.chroma.2004.02.035.

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10

Ye, Yun K., Barbara Lord, and Rodger W. Stringham. "Memory effect of mobile phase additives in chiral separations on a Chiralpak AD column." Journal of Chromatography A 945, no. 1-2 (2002): 139–46. http://dx.doi.org/10.1016/s0021-9673(01)01491-1.

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11

Rao, Ramisetti Nageswara, Kandukuri Nagesh Kumar, and Bompelli Sravan Kumar. "Liquid chromatographic separation and thermodynamic investigation of stereoisomers of darunavir on Chiralpak AD-Hcolumn." Journal of Separation Science 35, no. 20 (2012): 2671–77. http://dx.doi.org/10.1002/jssc.201200410.

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12

Čižmáriková, R., A. Némethy, J. Valentová, K. Hroboňová, and K. Bruchatá. "Synthesis and HPLC Enantioseparation of Derivatives of the 3-hydroxyphenylethanone." Acta Facultatis Pharmaceuticae Universitatis Comenianae 59, no. 2 (2012): 15–27. http://dx.doi.org/10.2478/v10219-012-0023-7.

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AbstractWithin the framework of the study of the synthesis and high-performance liquid chromatography (HPLC) enantioseparation the series of 9 derivatives of 3-hydroxyphenylethanone was prepared by a well-tried method. The structure of the prepared compounds was confirmed on the basis of interpretation of the IR, UV, 1H NMR and 13C NMR spectra. An enantioseparation of prepared compounds was performed using HPLC on a native teicoplanin (Chirobiotic T) and the amylose tris (3,5-dimethylphenylcarbamate) (Chiralpak AD) chiral stationary phases, which is more suitable for the enantioseparation of a

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13

Gyllenhaal, Olle, and Morgan Stefansson. "Reversal of elution order for profen acid enantiomers in normal phase LC on Chiralpak AD." Journal of Pharmaceutical and Biomedical Analysis 46, no. 5 (2008): 860–63. http://dx.doi.org/10.1016/j.jpba.2007.03.009.

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14

Gyllenhaal, Olle, and Morgan Stefansson. "Reversal of elution order for profen acid enantiomers in packed-column SFC on Chiralpak AD." Chirality 17, no. 5 (2005): 257–65. http://dx.doi.org/10.1002/chir.20160.

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15

Dai, Zhi, Charles U. Pittman, and Tingyu Li. "Enantiomeric Recognition of Racemic 4-Aryl-1,4-dihydropyridine Derivatives via Chiralpak AD-H Stationary Phases." Chirality 24, no. 10 (2012): 854–59. http://dx.doi.org/10.1002/chir.22083.

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16

Gyllenhaal, O. "Fast enantioselective separation of clevidipine and a dihydropyridine substituted acid by SFC on Chiralpak AD." Fresenius' Journal of Analytical Chemistry 369, no. 1 (2001): 54–56. http://dx.doi.org/10.1007/s002160000586.

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17

Xie, Jianchun, Jie Cheng, Huilan Han, Baoguo Sun та Gary W. Yanik. "Resolution of racemic γ-lactone flavors on Chiralpak AD by packed column supercritical fluid chromatography". Food Chemistry 124, № 3 (2011): 1107–12. http://dx.doi.org/10.1016/j.foodchem.2010.06.097.

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18

WANG, Min. "Enantioseparation of mandelic acid compounds with Chiralpak AD-H and Chiralcel OJ-H chiral stationary phases." Chinese Journal of Chromatography 32, no. 2 (2014): 198. http://dx.doi.org/10.3724/sp.j.1123.2013.09051.

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19

Magora, Amir, Saleh Abu-Lafi, and Shulamit Levin. "Comparison of the enantioseparation of racemic uridine analogs on Whelk-O 1 and ChiralPak-AD columns." Journal of Chromatography A 866, no. 2 (2000): 183–94. http://dx.doi.org/10.1016/s0021-9673(99)01108-5.

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20

Xu, Jin, Xiaoxiao Jiang, Jinghua Guo, Yongtao Chen, and Weifang Yu. "Competitive adsorption equilibrium model with continuous temperature dependent parameters for naringenin enantiomers on Chiralpak AD column." Journal of Chromatography A 1422 (November 2015): 163–69. http://dx.doi.org/10.1016/j.chroma.2015.10.018.

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21

Kunath, A., F. Theil, and K. Jähnisch. "Influence of the kind of the alcoholic modifier on chiral separation on a Chiralpak AD column." Journal of Chromatography A 728, no. 1-2 (1996): 249–57. http://dx.doi.org/10.1016/0021-9673(95)00891-8.

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22

CHENG, Bin, Yifan XIE, Youmin HU, Huizhong LIU, Yinyao NIU та Yang LU. "Enantioseparation of 3α-acyloxy-6β-acetoxyltropane compounds with Chiralpak AD and Chiralcel OD-H chiral stationary phases". Chinese Journal of Chromatography 33, № 6 (2015): 647. http://dx.doi.org/10.3724/sp.j.1123.2015.01038.

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23

Zabka, Michal, та Alírio E. Rodrigues. "Thermodynamic and Kinetic Study of Adsorption of R,S‐α‐Tetralol Enantiomers on the Chiral Adsorbent CHIRALPAK AD". Separation Science and Technology 42, № 4 (2007): 739–68. http://dx.doi.org/10.1080/01496390601120706.

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24

Balmér, Karin, Per-Olof Lagerström, Sam Larsson, and Bengt-Arne Persson. "Direct chiral separation of almokalant on Chiralcel OD and Chiralpak AD for liquid chromatographic assay of biological samples." Journal of Chromatography A 631, no. 1-2 (1993): 191–96. http://dx.doi.org/10.1016/0021-9673(93)80520-i.

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25

Droux, Serge, and Guy Félix. "Green chiral HPLC enantiomeric separations using high temperature liquid chromatography and subcritical water on chiralcel OD and chiralpak AD." Chirality 23, no. 1E (2011): E105—E109. http://dx.doi.org/10.1002/chir.21019.

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26

Zabka, Michal, та Alírio E. Rodrigues. "Measurement of pore diffusivity of R,S-α-Tetralol enantiomers in chiral adsorbent CHIRALPAK AD by zero length column method". Separation and Purification Technology 57, № 1 (2007): 74–84. http://dx.doi.org/10.1016/j.seppur.2007.03.011.

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27

Chilmonczyk, Zdzis?aw, Hanna Ksyci?ska, M. Mazgajska, and Hassan Y. Aboul-Enein. "Enantioselective separation of 1,4-disubstituted piperazine derivatives on two cellulose Chiralcel OD and OJ and one amylose Chiralpak AD chiral selectors." Chirality 11, no. 10 (1999): 790–94. http://dx.doi.org/10.1002/(sici)1520-636x(1999)11:10<790::aid-chir9>3.0.co;2-1.

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28

Aboul-Enein, H. Y., and S. A. Bakr. "Enantiomeric Resolution of Propranolol and Analogs on Two Cellulose (Chiralcel of and OC) AND One Amylose (Chiralpak Ad) Chiral Stationary Phases." Journal of Liquid Chromatography & Related Technologies 21, no. 8 (1998): 1137–45. http://dx.doi.org/10.1080/10826079808006589.

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29

Svensson, S., A. Karlsson, O. Gyllenhaal, and J. Vessman. "Chiral separations of metoprolol and some analogs with carbon dioxide on chiralcel OD and chiralpak AD stationary phases. Use of chemometrics." Chromatographia 51, no. 5-6 (2000): 283–93. http://dx.doi.org/10.1007/bf02490605.

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30

Toribio, L., J. L. Bernal, M. J. del Nozal, J. J. Jiménez, and E. M. Nieto. "Applications of the Chiralpak AD and Chiralcel OD chiral columns in the enantiomeric separation of several dioxolane compounds by supercritical fluid chromatography." Journal of Chromatography A 921, no. 2 (2001): 305–13. http://dx.doi.org/10.1016/s0021-9673(01)00844-5.

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31

McCarthy, James P. "Direct enantiomeric separation of the four stereoisomers of nadolol using normal-phase and reversed-phase high-performance liquid chromatography with Chiralpak AD." Journal of Chromatography A 685, no. 2 (1994): 349–55. http://dx.doi.org/10.1016/0021-9673(94)00803-5.

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32

Roussel, Christian, Cristina Suteu, Latifa Shaimi, et al. "Chiral separation of some 4a-methyl-1,2,3,4,4a,9a-hexahydro-fluoren-9-one derivatives as a probe for difference in solvation by 2-propanol of carbamate moiety in chiralcel OD-H, chiralpak AD, and chiralpak AS chiral stationary phases." Chirality 10, no. 8 (1998): 770–77. http://dx.doi.org/10.1002/(sici)1520-636x(1998)10:8<770::aid-chir8>3.0.co;2-0.

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33

Padivitage, Nilusha, Satish Kumar, and Abu Rustum. "Development and Validation of a Reversed-Phase Chiral HPLC Method to Determine the Chiral Purity of Bulk Batches of (S)-Enantiomer in Afoxolaner." Journal of AOAC INTERNATIONAL 100, no. 1 (2017): 65–73. http://dx.doi.org/10.5740/jaoacint.16-0096.

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Abstract Afoxolaner is a new antiparasitic molecule from the isoxazoline family that acts on insect acarine g-aminobutyric acid and glutamate receptors. Afoxolaner is a racemic mixture, which has a chiral center at the isoxazoline ring. A reversed-phase chiral HPLC method has been developed to determine the chiral purity of bulk batches of (S)-enantiomer in afoxolaner for the first time. This method can also be used to verifythat afoxolaner is a racemic mixture, which was demonstrated by specific rotation. ChromSword, an artificial intelligence method development tool, was used for initial met

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34

Ružena, Čižmáriková, Habala Ladislav, Valentová Jindra та Šmátralová Dana. "Syntéza a HPLC enantioseparácia nových derivátov 3-alkoxy-4-hydroxyfenylalkanónov typu potenciálnych α/β-blokátorov". Česká a slovenská farmacie 70, № 1 (2021): 51–58. http://dx.doi.org/10.5817/csf2021-2-51.

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The present paper reports the synthesis of a series of seven compounds with a hetero aminopropanol chain. The compounds were prepared by the conversion of 3-alkoxy-4-hydroxyphenyl alkanones with 2-chloromethyl oxirane and subsequent reaction of the products with heterocyclic amines (pyrrolidine, azepane, 4-methylpiperazine and 2-methoxyphenyl piperazine). The target compounds were synthesized in the form of racemates. The purity of the products was confirmed by thin layer chromatography and their IR, UV-VIS and 1H-NMR spectra were recorded. Enantioseparation of the racemic products was accompl

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35

Toribio, L., J. L. Bernal, M. T. Martín, J. Bernal, and M. J. del Nozal. "Effects of organic modifier and temperature on the enantiomeric separation of several azole drugs using supercritical fluid chromatography and the Chiralpak AD column." Biomedical Chromatography 28, no. 1 (2013): 152–58. http://dx.doi.org/10.1002/bmc.3013.

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36

Wu, Xiuli, Yange Zhang, Wenzhen Li, et al. "A Validated LC Method for the Enantiomeric Separation of EAI045 on Chiral Stationary Phase." Journal of Chromatographic Science 58, no. 6 (2020): 562–68. http://dx.doi.org/10.1093/chromsci/bmz125.

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Abstract A simple and accurate chiral liquid chromatographic method was developed for enantiomeric resolution and determination of 2-(5-fluoro-2-hydroxyphenyl)-2-(1-oxo-2,3-dihydro-1H-isoindol-2-yl)-N-(1,3-thiazol-2-yl)acetamide (EAI045). The enantiomers of EAI045 were baseline resolved on a Chiralpak AD-H (250 mm × 4.6 mm, 5 μm) column using a mobile phase system containing n-hexane: 2-propanol (75: 25 v/v) at a flow rate of 1 mL min−1 at 30°C. The eluted analytes were subsequently detected with an ultraviolet detector at 254 nm. The effects of organic modifiers and temperature on the enantio

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37

Nageswara Rao, R., and A. Narasa Raju. "Enantiospecific assay of citadiol—A key intermediate of escitalopram by liquid chromatography on Chiralpak AD-H column connected with UV and polarimetric detectors in series." Journal of Pharmaceutical and Biomedical Analysis 43, no. 1 (2007): 311–14. http://dx.doi.org/10.1016/j.jpba.2006.06.004.

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38

Mateus, F. H., J. S. Lepera, M. P. Marques, V. B. Boralli, and V. L. Lanchote. "Reduction of enantioselectivity in the kinetic disposition and metabolism of verapamil in rats exposed to toluene." Canadian Journal of Physiology and Pharmacology 86, no. 5 (2008): 232–39. http://dx.doi.org/10.1139/y08-017.

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Toluene and verapamil are subject to extensive oxidative metabolism mediated by CYP enzymes, and their interaction can be stereoselective. In the present study we investigated the influence of toluene inhalation on the enantioselective kinetic disposition of verapamil and its metabolite, norverapamil, in rats. Male Wistar rats (n = 6 per group) received a single dose of racemic verapamil (10 mg/kg) orally at the fifth day of nose-only toluene or air (control group) inhalation for 6 h/day (25, 50, and 100 ppm). Serial blood samples were collected from the tail up to 6 h after verapamil administ

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39

Welch, Christopher J., Jacob Fairchild, and Peter Sajonz. "Investigation of the stability of Chiralpak AD chiral stationary phase under various solvent conditions and development of a method to identify stationary phase-derived polymer contamination." Chirality 19, no. 8 (2007): 607–11. http://dx.doi.org/10.1002/chir.20348.

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40

Trivedi, Ravi Kumar, P. K. Dubey, Ramesh Mullangi, and Nuggehally R. Srinivas. "Development and validation of an enantioselective HPLC–UV method using Chiralpak AD-H to quantify (+)- and (−)-torcetrapib enantiomers in hamster plasma—application to a pharmacokinetic study." Journal of Chromatography B 857, no. 2 (2007): 224–30. http://dx.doi.org/10.1016/j.jchromb.2007.07.045.

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41

Zin, Lilian, Camilla Silva, Luciana Guimarães, Keyller Borges, and Clebio Nascimento. "SEPARAÇÃO ENANTIOSSELETIVA DA OXIBUTININA: UMA INVESTIGAÇÃO TEÓRICA E EXPERIMENTAL." Química Nova, 2021. http://dx.doi.org/10.21577/0100-4042.20170815.

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ENANTIOSELECTIVE SEPARATION OF OXYBUTYNIN: A THEORETICAL AND EXPERIMENTAL INVESTIGATION. In this work, we have studied both experimentally and theoretically the oxybutynin chiral discrimination. According to the main results, the enantioseparation of oxybutynin was efficiently achieved by high performance liquid chromatography in normal phase using the Chiralpak® AD column, which has amylose tris (3,5‐dimethylphenylcarbamate) as a chiral selector. The energetic and structural parameters obtained via density functional theory calculations pointed out the chiral discrimination as well as the ena

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42

Zhuang, Jinyou, Satish Kumar, and Abu Rustum. "Development and Validation of a Normal Phase Chiral HPLC Method for Analysis of Afoxolaner Using a Chiralpak®AD-3 Column." Journal of Chromatographic Science, October 7, 2016. http://dx.doi.org/10.1093/chromsci/bmw162.

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