Enantiomeric resolution, thermodynamic parameters, and modeling of clausenamidone and neoclausenamidone on polysaccharide-based chiral stationary phases.
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DOI: 10.1002/chir.23068
Abstract: The aim of the paper is to describe a new synthesis route to obtain synthetic optically active clausenamidone and neoclausenamidone and then use high-performance liquid chromatography (HPLC) to determine the optical purities of these isomers.… read more here.
Keywords: resolution; clausenamidone neoclausenamidone; chiral stationary; neoclausenamidone ... See more keywords
New chiral stationary phases for liquid chromatography based on small molecules: Development, enantioresolution evaluation and chiral recognition mechanisms.
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DOI: 10.1002/chir.23142
Abstract: Recently, we reported the development of new chiral stationary phases (CSPs) for liquid chromatography (LC) based on chiral derivatives of xanthones (CDXs). Based on the most promising CDX selectors, 12 new CSPs were successfully prepared… read more here.
Keywords: small molecules; chromatography based; chiral stationary; liquid chromatography ... See more keywords
Synthesis and application of N-3,5-dinitrobenzoyl and C3 symmetric diastereomeric chiral stationary phases.
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DOI: 10.1002/chir.23415
Abstract: Three diastereomeric chiral compounds, namely, (R,R)-(+)-2-amino-1,2-diphenylethanol, (1S,2R)-(+)-2-amino-1,2-diphenylethanol, and (1R,2R)-(+)-1,2-diphenylethylenediamine were used as starting materials for preparing three N-3,5-dinitrobenzoyl derivative chiral stationary phases (CSPs) (CSP 1, 2, and 3) and three C3 symmetric CSPs (CSP 4,… read more here.
Keywords: application dinitrobenzoyl; dinitrobenzoyl symmetric; synthesis application; stationary phases ... See more keywords
Chiral separation of dipeptides on Cinchona-based zwitterionic chiral stationary phases under buffer-free reversed-phase conditions.
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DOI: 10.1002/chir.23471
Abstract: Chiral zwitterion ion exchangers represent efficient chiral stationary phases for stereoselective resolution of various analytes including chiral acids, bases, and zwitterions. In this contribution, we have focused on utilization of chiral zwitterionic sorbents, denoted as… read more here.
Keywords: reversed phase; stationary phases; free reversed; buffer free ... See more keywords
Enantioseparation and molecular modeling study of chiral amines as three naphthaldimine derivatives using amylose or cellulose trisphenylcarbamate chiral stationary phases.
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DOI: 10.1002/chir.23513
Abstract: This study describes the enantioseparation of three chiral amines as naphthaldimine derivatives, using normal phase HPLC with amylose and cellulose tris(3,5-dimethylphenylcarbamate) chiral stationary phases (CSPs). Three chiral amines were derivatized using three structurally similar naphthaldehyde… read more here.
Keywords: naphthaldimine derivatives; stationary phases; chiral amines; derivatives using ... See more keywords
Preparation and chromatographic performance of chiral peptide-based stationary phases for enantiomeric separation.
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DOI: 10.1002/chir.23564
Abstract: This study presents the development of three new chiral stationary phases. They are based on silica modified with peptides containing phenylalanine and proline. Successful analyses and characterizations were conducted using Fourier transform infrared spectra, elemental… read more here.
Keywords: peptide based; stationary phases; enantiomeric separation; performance ... See more keywords
Amino alcohol-derived chiral stationary phases.
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DOI: 10.1002/chir.23574
Abstract: An updated minireview of chiral stationary phases (CSPs) based on amino alcohols is presented. In this minireview, we focused on amino alcohols as starting materials in preparation of chiral catalysts for asymmetric organic synthesis and… read more here.
Keywords: csps; stationary phases; amino alcohol; chiral stationary ... See more keywords
Click regulation of cyclodextrin primary face for the preparation of novel chiral stationary phases
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DOI: 10.1002/elps.201800418
Abstract: In this study, a series of novel CD chiral stationary phases were fabricated by immobilization of mono‐6A‐deoxy‐N3‐cyclodextrin onto silica surfaces followed by click regulation of CD primary face with 4‐pentynoic acid (acidic moiety), 2‐propynylamine (alkaline… read more here.
Keywords: novel chiral; primary face; chiral stationary; moiety ... See more keywords
β‐Cyclodextrin covalent organic framework supported by polydopamine as stationary phases for electrochromatographic enantioseparation
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DOI: 10.1002/elps.202200029
Abstract: In this work, a new open‐tubular capillary electrochromatography (OT‐CEC) column was prepared using β‐cyclodextrin covalent organic framework (β‐CD COF) as a stationary phase. Polydopamine was used to assist fabrication of β‐CD COF on an inner… read more here.
Keywords: covalent organic; organic framework; cyclodextrin covalent; stationary phases ... See more keywords
Investigation of poly[oligo(ethylene glycol)diacrylates] as potential stationary phases in GC.
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DOI: 10.1002/jssc.201700413
Abstract: Poly[oligo(ethylene glycol)diacrylate]s were investigated as potential candidates for application as stationary phases in capillary gas chromatography. Depending on the molar mass of the monomer, up to three different phase transitions were observed in calorimetric scans… read more here.
Keywords: investigation poly; oligo ethylene; poly oligo; ethylene glycol ... See more keywords
The competitiveness of solvent adsorption on polar-embedded stationary phases.
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DOI: 10.1002/jssc.201800830
Abstract: Solvation processes on polar embedded stationary phases were investigated by determination of excess isotherms in binary acetonitrile/water mobile phase. The obtained results indicate the competitiveness of acetonitrile and water adsorption on heterogeneous surfaces of chemically… read more here.
Keywords: competitiveness solvent; adsorption; water; polar embedded ... See more keywords