Journal ArticleDOI
Chiral-bonded silica gel stationary phases obtained from chiral silanes for high-performance liquid chromatography: Comparison of performance with that of stationary phases obtained from γ-aminopropylsilica gel☆
TLDR
In this article, several chiral triethoxysilanes, easily prepared from acidic or basic chiral compounds and aminopropyltriethioxysilane or isocyanatepropyltriethyldisilazanc were bonded onto silica gel.About:
This article is published in Journal of Chromatography A.The article was published on 1992-07-31. It has received 23 citations till now. The article focuses on the topics: Chiral column chromatography & Silica gel.read more
Citations
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Asymmetric Catalysis in the [2+2+2] Cycloaddition of Arynes and Alkynes: Enantioselective Synthesis of a Pentahelicene
TL;DR: The use of BINAP-based palladium catalysts in the reaction of 7-methoxy-1,2-didehydronaphthalene (2) and dimethyl acetylenedicarboxylate (DMAD) affords non-racemic 9,12-dimethoxypentahelicene 1 with reasonable ees, among other cycloaddition products as discussed by the authors.
Journal ArticleDOI
Synthesis of covalently bonded cellulose derivative chiral stationary phases with a bifunctional reagent of 3-(triethoxysilyl)propyl isocyanate.
TL;DR: It was observed that the chiral recognition capabilities of the non-regioselectively prepared CSPs were influenced by the amount of TEPI used, and the regiose elective procedures were highly advantageous to rapid preparation.
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Complexing and Chelating Agents Immobilized on Silica Gel and Related Materials and Their Application for Sorption of Inorganic Species
TL;DR: In this paper, the properties of the oxide supporting materials, silica gel in particular, their chemical and physical properties and the nature of the surface residues are part of this review and data on silanization procedures to bond supporting materials with commercial or synthesized organosilicon compounds have been carefully collected and discussed.
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Enantiomeric resolution and determination of the absolute configuration of dibenzophosphole 5-oxides
Ernesto Durán,Esther Gordo,Jaume Granell,Mercè Font-Bardia,Xavier Solans,Dolores Velasco,Francisco López-Calahorra +6 more
TL;DR: In this article, the resolution of asymmetrically substituted dibenzophospholes via chromatographic separation of their cyclopalladium derivatives is described for the first time, and a general NMR criterion for the complete determination of the configuration of this group of products is proposed.
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Doubly tethered tertiary amide selectors: Modified version of Doyle et al.'s naproxen chiral stationary phase
TL;DR: Doyle et al. as mentioned in this paper proposed a chiral stationary phase (CSP) that avoids the presence of amide hydrogen which often serves to increase retention, attenuate enantioselectivity and diminish the efficiency of the CSP.
References
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Journal ArticleDOI
Broad spectrum resolution of optical isomers using chiral high-performance liquid chromatographic bonded phases
TL;DR: In this paper, a chiral fluoroalcoholic bonded stationary phase has been devised which proves capable of separating the enantiomers of a large number of solutes including sulfoxides, lactones, and derivatives of alcohols, amines, amino acids, hydroxy acids, and mercaptans.
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Recent developments in the evaluation of chemically bonded silica packings for liquid chromatography
TL;DR: In this paper, the basic variables and conditions in the synthesis of chemically bonded silica packings (CBSPs), obtainable by means of a surface reaction between porous silica and an organochlorosilane or organoethoxysilane as a modifier, yielding a dense monolayer of bonded functional groups, are discussed.
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Techniques de remplissage de colonnes de chromatographie liquide à haute performance avec des microparticules poreuses
TL;DR: In this paper, column parameters (length and internal diameter) were studied and a study of column parameters showed that an internal diameter of 4.6 mm gave the best results with the injection system used.
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Useful and easily prepared chiral stationary phases for the direct chromatographic separation of the enantiomers of a variety of derivatized amines, amino acids, alcohols, and related compounds
William H. Pirkle,Thomas C. Pochapsky,George S. Mahler,Debbi E. Corey,Daniel S. Reno,Donna M. Alessi +5 more