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Chiral separations

Development of an in capillary derivatization method by CE for the determination of chiral amino acids in dietary supplements and wines

Development of an in capillary derivatization method by CE for the determination of chiral amino acids in dietary supplements and wines

... in chiral separations of amino acids by CE, but they require long reaction times for derivatization and cannot be employed in the in-capillary ...for chiral analysis of amino acids, such as serine ...

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Synthesis of chiral carbosilane dendrimers with L cysteine and N acetyl L cysteine on their surface and their application as chiral selectors for enantiomer separation by capillary electrophoresis

Synthesis of chiral carbosilane dendrimers with L cysteine and N acetyl L cysteine on their surface and their application as chiral selectors for enantiomer separation by capillary electrophoresis

... direct chiral separation and determination of the enantiomers of chiral compounds due to its inherent advantages such as simplicity, high efficiency and resolution power, rapid analysis and a reasonable ...

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Enantiomeric separation of a group of chiral dihydropyridines by electrokinetic chromatography

Enantiomeric separation of a group of chiral dihydropyridines by electrokinetic chromatography

... obtain chiral separations in CE, this compound should be a chiral selector which can recognize both enantiomers stereoselectively, ...enantiomeric separations, among them: native cy- ...

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Sensitive chiral analysis by CE: An update  Review

Sensitive chiral analysis by CE: An update Review

... achieve chiral separations, the development of analytical methodologies enabling the sensitive determination of enantiomers has been the aim of a considerable number of ...one chiral selector in the ...

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Separation of etodolac enantiomers by capillary electrophoresis  Validation and application of the chiral method to the analysis of commercial formulations

Separation of etodolac enantiomers by capillary electrophoresis Validation and application of the chiral method to the analysis of commercial formulations

... a chiral separation method by CE using cyclodextrins (CDs) as chiral selectors due to their potential for chiral separations, commercial availability, stability, and easy use in comparison ...

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Monitoring the stereoselectivity of biodegradation of chiral polychlorinated biphenyls using electrokinetic chromatography

Monitoring the stereoselectivity of biodegradation of chiral polychlorinated biphenyls using electrokinetic chromatography

... or chiral PCBs has been gas chromatography (GC) [7 – ...of chiral separations because of its flexibility and high separation efficiency ...strong chiral recognition towards several ...

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Comparison of charged cyclodextrin derivatives for the chiral separation of atropisomeric polychlorinated biphenyls by capillary electrophoresis

Comparison of charged cyclodextrin derivatives for the chiral separation of atropisomeric polychlorinated biphenyls by capillary electrophoresis

... used chiral selectors [1–4]. The use of CE for chiral separations has three major advantages in compar- ison with HPLC: the low consumption of the chiral selector (reduced costs), high ...

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Inverse magnetic catalysis for the chiral transition induced by thermo magnetic effects on the coupling constant

Inverse magnetic catalysis for the chiral transition induced by thermo magnetic effects on the coupling constant

... Given the variety of explanations for the inverse magnetic catalysis, one can ask for the veracity of the commonly held belief that both aspects of QCD, namely, deconfinement and chiral symmetry breaking, need to ...

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Development of polymer supported chiral aminoalcohols derived from biomass and their application to asymmetric alkylation

Development of polymer supported chiral aminoalcohols derived from biomass and their application to asymmetric alkylation

... reported chiral 1,2-aminoalcohols, we decided to explore their performance after immobilization on a solid support for the heterogeneous enantioselective diethylzinc addition to ...as chiral ligands in the ...

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Enantiomeric separation and determination of stereospecific drug release from marketed racemic omeprazole products by chiral HPLC

Enantiomeric separation and determination of stereospecific drug release from marketed racemic omeprazole products by chiral HPLC

... From the S/R ratios of different racemic omeprazole marketed products it was concluded that at 5 and 10 min disso- lution time points there was a stereospecific drug release between the [r] ...

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Chiral Thinking and Asymmetries of Writing Between Science and Literature: Primo Levi and Italo Calvino

Chiral Thinking and Asymmetries of Writing Between Science and Literature: Primo Levi and Italo Calvino

... Out of these asymmetrical materials, a series of hierarchical distinctions emerges that judge a page of writing negatively as untrustworthy, useless, or distorted with respect to «reality». When Faussone, in Alaska, ...

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Synthesis of new chiral 1,3 aminoalcohols derived from levoglucosenone and their application in asymmetric alkylations

Synthesis of new chiral 1,3 aminoalcohols derived from levoglucosenone and their application in asymmetric alkylations

... new chiral 1,3-aminoalcohols derived from levoglucosenone was envisaged by functionalizing the double bond of 1, using a general procedure which involves a Diels– Alder reaction between 1 and a suitable ...

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Chiral Bifunctional Thioureas and Squaramides Grafted into Old Polymers of Intrinsic Microporosity for Novel Applications

Chiral Bifunctional Thioureas and Squaramides Grafted into Old Polymers of Intrinsic Microporosity for Novel Applications

... We synthesized two different substituted bifunctional chiral thioureas and one squaramide into the backbone of both PIM-1 and PIM-CO-100 as summarized in Scheme 1. PIM-1, prepared from 5,5 0 ,6,6 0 ...

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New chiral 1,2 aminoalcohols derived from biomass and their application in diethyl zinc additions

New chiral 1,2 aminoalcohols derived from biomass and their application in diethyl zinc additions

... Chiral 1,2-aminoalcohols are versatile synthons for the preparation of a wide range of biologically active compounds as well as catalysts for asymmetric synthesis. 1 One of the most extensively studied ...

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Chiral Ureas and Thioureas Supported on Polystyrene for Enantioselective Aza Henry Reaction in Solvent free conditions

Chiral Ureas and Thioureas Supported on Polystyrene for Enantioselective Aza Henry Reaction in Solvent free conditions

... way, chiral thioureas have been anchored into different functionalized polymers, 24 mesoporous silica gel, 25 and magnetic nanoparticles, 26 but to the best of our knowledge, there are not antecedents on the use ...

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TítuloFerrocenylindium reagents in palladium‐catalyzed cross‐coupling reactions: asymmetric synthesis of planar chiral 2‐aryl oxazolyl and sulfinyl ferrocenes

TítuloFerrocenylindium reagents in palladium‐catalyzed cross‐coupling reactions: asymmetric synthesis of planar chiral 2‐aryl oxazolyl and sulfinyl ferrocenes

... [2] a) Chiral Ferrocenes in Asymmetric Catalysis, (Eds.: L.-X. Dai, X.-L. Hou), Wiley-VCH, Weinheim, 2010. For selected references: b) M. Pérez, M. Fañanás-Mastral, P. H. Bos, A. Rudolph, S. R. Harutyunyan, B. L. ...

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Chemoenzymatic synthesis of optically active 2 (2  or 4 substituted 1H imidazol 1 yl)cycloalcanols  Chiral additives for (L) proline

Chemoenzymatic synthesis of optically active 2 (2 or 4 substituted 1H imidazol 1 yl)cycloalcanols Chiral additives for (L) proline

... Thus, such proline–chiral imidazole interactions can provide an opportunity for the fine tuning of the catalytic performance of L-proline.15 The impact of substituted trans-2-imidazoyl-c[r] ...

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Prediction of the Binding Affinity between Fenoterol Derivatives and the β2-Adrenergic Receptor Using Atom-Based 3D-Chiral Linear Indices

Prediction of the Binding Affinity between Fenoterol Derivatives and the β2-Adrenergic Receptor Using Atom-Based 3D-Chiral Linear Indices

... report, it has been shown that non-stochastic and stochastic atom-based 3D-chiral linear indices result is quite versatile and can be applied in 3D-QSAR studies; the QSAR models obtained with our approach achieve ...

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Weak magnetic field effects on chiral critical temperature in a nonlocal Nambu Jona Lasinio model

Weak magnetic field effects on chiral critical temperature in a nonlocal Nambu Jona Lasinio model

... In this paper we study the nonlocal Nambu–Jona-Lasinio model with a Gaussian regu- lator in the chiral limit. Finite temperature effects and the presence of a homogeneous magnetic field are considered. The magnetic ...

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Double diastereoselection in anti aldol reactions mediated by dicyclohexylchloroborane between an L erythrulose derivative and chiral aldehydes

Double diastereoselection in anti aldol reactions mediated by dicyclohexylchloroborane between an L erythrulose derivative and chiral aldehydes

... Scheme 1 Aldol additions of a Z boron enolate of chiral ketone 1 to achiral aldehydes via a chair-like transition state (TS) (Chx = cyclohexyl; TBS = tert-butyldimethylsilyl). Subsequently to these initial ...

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