Results 151 to 160 of about 2,499 (191)
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Analytica Chimica Acta, 2005
Abstract The enantioseparation of a set of new cyclopropanes derived from Meldrum's acid, dimethyl malonate, (silanoxyvinyl)-diazoacetates and 3,3,3-trifluoro-2-diazopropionate has been achieved on cellulose tris(3,5-dimethylphenylcarbamate) Chiralcel OD coated on 10 μm silica-gel as chiral stationary phase in high-performance liquid chromatography ...
Ghanem Abdallah, Ashraf +3 more
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Abstract The enantioseparation of a set of new cyclopropanes derived from Meldrum's acid, dimethyl malonate, (silanoxyvinyl)-diazoacetates and 3,3,3-trifluoro-2-diazopropionate has been achieved on cellulose tris(3,5-dimethylphenylcarbamate) Chiralcel OD coated on 10 μm silica-gel as chiral stationary phase in high-performance liquid chromatography ...
Ghanem Abdallah, Ashraf +3 more
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2012
Generally, in using chromatography as an industrial-scale production process, batch separation is not adequate from the standpoint of productivity and mobile phase consumption; thus, a continuous separation is preferred. The simulated moving bed (SMB) method is one of the best popular practices of continuous chromatographic separation. In this chapter,
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Generally, in using chromatography as an industrial-scale production process, batch separation is not adequate from the standpoint of productivity and mobile phase consumption; thus, a continuous separation is preferred. The simulated moving bed (SMB) method is one of the best popular practices of continuous chromatographic separation. In this chapter,
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HPLC Enantioseparations with Polysaccharide-Based Chiral Stationary Phases in HILIC Conditions
2019In contrast to achiral hydrophilic interaction liquid chromatography (HILIC), which is a popular and largely applied technique to analyze polar compounds such as pharmaceuticals, metabolites, proteins, peptides, amino acids, oligonucleotides, and carbohydrates, the introduction of the HILIC concept in enantioselective chromatography has been relatively
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Journal of Chromatography A, 2004
The effects of ethanesulfonic acid (ESA) and n-butylamine as additives were studied for a wide variety of chiral compounds using the polysaccharide chiral stationary phase (CSP), Chiralpak AD. The mobile phase consisted of hexane-ethanol (90:10, v/v).
Yun K, Ye +2 more
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The effects of ethanesulfonic acid (ESA) and n-butylamine as additives were studied for a wide variety of chiral compounds using the polysaccharide chiral stationary phase (CSP), Chiralpak AD. The mobile phase consisted of hexane-ethanol (90:10, v/v).
Yun K, Ye +2 more
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Journal of Chromatography A, 2011
Enantioseparation of naproxen was performed on an immobilized polysaccharide-based chiral stationary phase (CSP), Chiralpak IA, in the normal-phase mode. The effects of polar alcohol modifier in mobile phase and column temperature on retention, enantioseparation, and elution order were investigated. Two unusual phenomena were observed.
Cui, Xiang +6 more
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Enantioseparation of naproxen was performed on an immobilized polysaccharide-based chiral stationary phase (CSP), Chiralpak IA, in the normal-phase mode. The effects of polar alcohol modifier in mobile phase and column temperature on retention, enantioseparation, and elution order were investigated. Two unusual phenomena were observed.
Cui, Xiang +6 more
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Journal of Chromatography A, 2010
High-performance liquid chromatographic methods were developed for the separation of the enantiomers of five new aminonaphthol analogs possessing two chiral centers. The direct separations were performed on chiral stationary phases containing either amylose-tris-3,5-dimethylphenyl carbamate (Kromasil AmyCoat column) or cellulose-tris-3,5-dimethylphenyl
István, Ilisz +5 more
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High-performance liquid chromatographic methods were developed for the separation of the enantiomers of five new aminonaphthol analogs possessing two chiral centers. The direct separations were performed on chiral stationary phases containing either amylose-tris-3,5-dimethylphenyl carbamate (Kromasil AmyCoat column) or cellulose-tris-3,5-dimethylphenyl
István, Ilisz +5 more
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Evaluation of polysaccharide‐based chiral stationary phases in quality control of (S)‐mirtazapine
Biomedical Chromatography, 2011ABSTRACTHigh‐performance liquid chromatographic methods were developed for separation of the enantiomers of mirtazapine and its four process‐related substances. The direct separations were achieved on chiral stationary phases containing amylose tris(3,5‐dimethylphenylcarbamate) (Chiralpak® AD‐H), cellulose tris(3,5‐dimethylphenylcarbamate) (Chiralcel ...
R Nageswara, Rao +2 more
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Journal of Separation Science, 2017
Chiral high‐performance liquid chromatography separation of two recently synthesized liquid crystalline materials C1 and C2 was studied in the reversed‐phase mode. Both materials have an azo‐moiety and one chiral center in their molecular structures. They were available in racemic and pure S forms.
Terézia, Vojtylová +4 more
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Chiral high‐performance liquid chromatography separation of two recently synthesized liquid crystalline materials C1 and C2 was studied in the reversed‐phase mode. Both materials have an azo‐moiety and one chiral center in their molecular structures. They were available in racemic and pure S forms.
Terézia, Vojtylová +4 more
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Chirality, 2015
AbstractNine β‐aminoketones were synthesized via Mannich reaction when benzaldehyde was condensed with some primary amines and acetophenone. The purified compounds were identified by using spectroscopic methods. The enantiomeric separation of these derivatives was carried out by high‐performance liquid chromatography (HPLC) using several coated and ...
Khadidja, Addadi +4 more
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AbstractNine β‐aminoketones were synthesized via Mannich reaction when benzaldehyde was condensed with some primary amines and acetophenone. The purified compounds were identified by using spectroscopic methods. The enantiomeric separation of these derivatives was carried out by high‐performance liquid chromatography (HPLC) using several coated and ...
Khadidja, Addadi +4 more
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Chirality, 2006
AbstractThe direct HPLC enantioseparation of Mianserin and a series of aptazepine derivatives is accomplished on polysaccharide‐based chiral stationary phases (CSPs). The resolutions are performed on the coated‐type Chiralcel OD and Chiralpak AD CSPs and on the first commercially available immobilized‐type Chiralpak IA CSP, in normal‐phase and polar ...
CIRILLI R +6 more
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AbstractThe direct HPLC enantioseparation of Mianserin and a series of aptazepine derivatives is accomplished on polysaccharide‐based chiral stationary phases (CSPs). The resolutions are performed on the coated‐type Chiralcel OD and Chiralpak AD CSPs and on the first commercially available immobilized‐type Chiralpak IA CSP, in normal‐phase and polar ...
CIRILLI R +6 more
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