Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Harri Czesla"'
Autor:
Maximilian Kühnle, Volker Schurig, Diana Kreidler, Paul Schuler, Harri Czesla, Karsten Holtin, Klaus Albert
Publikováno v:
Chirality. 22:808-812
The hyphenation of enantioselective capillary gas chromatography and mass spectrometry is not always sufficient to distinguish between structural isomers, thus requiring peak identification by NMR spectroscopy. Here the first online coupling of enant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::63af6721958f94b5be01b52809c31787
https://doi.org/10.1002/chir.20840
https://doi.org/10.1002/chir.20840
Autor:
Klaus Albert, Andrew Webb, Diana Kreidler, Paul Schuler, Volker Schurig, Harri Czesla, Armin Purea, Marc David Grynbaum, Walter Schaal, Jens Rehbein
Publikováno v:
Analytical Chemistry. 79:2708-2713
Whereas the hyphenation of gas chromatography (GC) with mass spectrometry is of great importance, little is known about the coupling to nuclear magnetic resonance spectroscopy (NMR). The investigation of this technique is an attractive proposition be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::effd6c7c47fbe99aa3f476b52a63eec9
https://doi.org/10.1021/ac0617767
https://doi.org/10.1021/ac0617767
Publikováno v:
Tetrahedron. 55:9787-9792
An improved synthesis of enantiomerically pure(S, E)-(+)-5-methylhept-2-en-4-one from(S)-(+)-2-methyl-1-butanol in four steps is reported. An improved chiral-pool synthesis of enantiomerically pure(S)-(+)-filbertone, starting from(S)-(+)-2-methyl-1-b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fce46f25e389f4a732efd70b7d18431
https://doi.org/10.1016/s0040-4020(99)00534-7
https://doi.org/10.1016/s0040-4020(99)00534-7
Publikováno v:
Journal of Microcolumn Separations. 9:421-431
The feasibility of miniaturized enantiomer separation by open tubular liquid chromatography (OTLC) as well as by open tubular electrochromatography (OTEC) in 50 μm i.d. and 25 μm i.d. fused silica capillaries coated with CHIRASIL-DEX, a covalently
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16e194022b360b54f0d6bc37ad6f2743
https://doi.org/10.1002/(sici)1520-667x(1997)9:5<421::aid-mcs8>3.0.co
https://doi.org/10.1002/(sici)1520-667x(1997)9:5<421::aid-mcs8>3.0.co
Publikováno v:
ChemInform. 30
An improved synthesis of enantiomerically pure(S, E)-(+)-5-methylhept-2-en-4-one from(S)-(+)-2-methyl-1-butanol in four steps is reported. An improved chiral-pool synthesis of enantiomerically pure(S)-(+)-filbertone, starting from(S)-(+)-2-methyl-1-b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7517935be8caa2221878873aaa8f7f6
https://doi.org/10.1002/chin.199945291
https://doi.org/10.1002/chin.199945291
Publikováno v:
Chirality. 21(1)
The chromatographic enantioseparation of small unfunctionalized chiral alkanes C*HR(1)R(2)R(3) (R = alkyl) represents a challenge in separation science. Because of the lack of any functional groups, enantiorecognition in the presence of a chiral sele
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::885e31627f50f757315d859d872afb4a
https://pubmed.ncbi.nlm.nih.gov/18698642
https://pubmed.ncbi.nlm.nih.gov/18698642
Autor:
Klaus Albert, Karsten Holtin, Maximilian Kühnle, Paul Schuler, Diana Kreidler, Harri Czesla, Walter Schaal, Volker Schurig
Publikováno v:
Analytical chemistry. 80(14)
The identification of volatile cis/trans-stereoisomers was accomplished by employing a hyphenated GC-NMR system. The chromatographic and spectroscopic conditions were optimized with respect to the (1)H NMR detection. A special processing technique wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d74fa2676a3db154afedb9ed8c46df11
https://pubmed.ncbi.nlm.nih.gov/18533684
https://pubmed.ncbi.nlm.nih.gov/18533684
Publikováno v:
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences. 875(1)
In an effort to simultaneously enantioseparate racemic unfunctionalized alkanes and racemic α-amino acid derivatives by gas chromatography (GC) in forthcoming experiments related to the search for extraterrestrial homochirality, the two versatile mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed403ab1cd0fbbec6165ea66a8645629
https://pubmed.ncbi.nlm.nih.gov/18701355
https://pubmed.ncbi.nlm.nih.gov/18701355
Publikováno v:
Analytical chemistry. 79(12)
Inversion of the elution order of enantiomers caused by enthalpy-entropy compensation at the isoenantioselective temperature (Tiso) was experimentally observed by gas chromatography on the diamide-type chiral stationary phase (CSP), Chirasil-L-Val-C1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc31f4637b4044057835c05f59bb9357
https://pubmed.ncbi.nlm.nih.gov/17489556
https://pubmed.ncbi.nlm.nih.gov/17489556
Publikováno v:
Journal of separation science. 30(1)
Combination of the enantioselective properties of the two versatile gas-chromatographic chiral stationary phases (CSPs) octakis(3-O-butanoyl-2,6-di-O-n-pentyl)-gamma-CD (Lipodex E) 1 and L-valine-diamide-based CSP Chirasil-Val-C11 2 has been realized
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b41c91a4d6bcf058764e70b6831a00be
https://pubmed.ncbi.nlm.nih.gov/17313147
https://pubmed.ncbi.nlm.nih.gov/17313147