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
A new chiral stationary phase based on noscapine: Synthesis, enantioseparation, and docking study.
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DOI: 10.1002/chir.23488
Abstract: Noscapine is an isolated compound from the opium poppy, with distinctive chiral structure and chemistry, interacts with other compounds due to having multiple π-acceptors, hydrogen bond acceptors, and ionic sites. Therefore, it has promising applicability… read more here.
Keywords: stationary phase; new chiral; phase based; phase ... 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
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
A new single‐urea‐bound 3,5‐dimethylphenylcarbamoylated β‐cyclodextrin chiral stationary phase and its enhanced separation performance in normal‐phase liquid chromatography
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DOI: 10.1002/elps.201700273
Abstract: A new single‐urea‐bound chiral stationary phase based on 3,5‐dimethylphenylcarbamoylated β‐cyclodextrin was prepared through the Staudinger reaction of mono (6A‐azido‐6A‐deoxy)‐per(3,5‐dimethylphenylcarbamoylated) β‐cyclodextrin and 3‐aminopropyl silica gel under CO2 atmosphere. The new phase exhibited good enantioseparation performance for… read more here.
Keywords: phase; dimethylphenylcarbamoylated cyclodextrin; normal phase; stationary phase ... 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
Liquid chromatographic resolution of proline and pipecolic acid derivatives on chiral stationary phases based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid.
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DOI: 10.1002/jssc.201700996
Abstract: Two liquid chromatographic chiral stationary phases based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid were applied to the resolution of the amide derivatives of cyclic α-amino acids including proline and pipecolic acid. Among the five amide derivatives of proline,… read more here.
Keywords: chiral stationary; resolution; stationary phase; pipecolic acid ... See more keywords
Comparative study on the liquid chromatographic enantioseparation of cyclic β-amino acids and the related cyclic β-aminohydroxamic acids on Cinchona alkaloid-based zwitterionic chiral stationary phases.
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DOI: 10.1002/jssc.201701190
Abstract: The enantiomeric pairs of cis and trans stereoisomers of cyclic β-aminohydroxamic acids and their related cis and trans cyclic β-amino acids containing two chiral centers were directly separated on four structurally related chiral stationary phases… read more here.
Keywords: aminohydroxamic acids; amino acids; acids related; cyclic amino ... See more keywords