Výsledky vyhledávání - "Zbigniew Kubica"

Conformational investigation of α,β-dehydropeptides VII*. Conformation of Ac-Pro-ΔAla-NHCH3 and Ac-Pro-(E)-ΔAbu-NHCH3: comparison with (Z)-substituted α,β-dehydropeptides†

Autor: Pietrzyński G, Barbara Rzeszotarska, Zbigniew Kubica, Marek Lisowski, Guy Boussard, Ciszak. E.

Publikováno v: International Journal of Peptide and Protein Research. 48:347-356

The crystal structure and solution conformation of Ac-Pro-deltaAla-NHCH3 and the solution conformation of Ac-Pro-(E)-deltaAbu-NHCH3 were investigated by X-ray diffraction method and NMR, FTIR and CD spectroscopies. Ac-Pro-deltaAla-NHCH3 adopts an ext

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9fc58e7cd6107ac78b188e6c0002205c
https://doi.org/10.1111/j.1399-3011.1996.tb00851.x

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Conformational investigation of αβ-dehydropeptides

Autor: Pietrzyński G, Zbigniew Kubica, Barbara Rzeszotarska

Publikováno v: International Journal of Peptide and Protein Research. 40:524-531

Solution conformations of three series of model peptides, homochiral Ac-Pro-L-Xaa-NHCH3 and heterochiral Ac-Pro-D-Xaa-NHCH3 (Xaa = Val, Phe, Leu, Abu, Ala) as well as alpha,beta-unsaturated Ac-Pro-delta Xaa-NHCH3 [delta Xaa = delta Val, (Z)-delta Phe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8a18e4f7427966222e82e911ec8ef1e0
https://doi.org/10.1111/j.1399-3011.1992.tb00436.x

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N-Acetyl-α, β-dehydroamino acid N’-methylamides and N’, N’-Dimethylamides

Autor: Leszek Smelka, Zbigniew Kubica, Barbara Rzeszotarska, Małgorzata A. Broda

Publikováno v: Organic Preparations and Procedures International. 29(6):696-701

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::942f5d576f47c2a722185f68b85582f7
https://www.tandfonline.com/doi/abs/10.1080/00304949709355251

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Co-ordination of copper(II) ions by prolyl-α,β-dehydroamino acids: comparative studies and general considerations

Autor: Barbara Rzeszotarska, Zbigniew Kubica, Kataline Várnagy, Leszek Smelka, Imre Sóvágó, Małgorzata Jeżowska-Bojczuk, Henryk Kozlowski, Marcin Dyba, Pietrzyński G

Publikováno v: J. Chem. Soc., Dalton Trans.. :3265-3268

Potentiometric and spectroscopic measurements and theoretical calculations have revealed that α,β-dehydroamino acid residues have a considerable effect on the co-ordination ability of an adjacent amide nitrogen towards Cu2+ ions. Also the side chai

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a3193d9eae491fed836c772f8632e54a
https://doi.org/10.1039/dt9960003265

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Unusual binding ability of α,β-dehydrodipeptides towards metal ions

Autor: Małgorzata Jeżowska-Bojczuk, Imre Sóvágó, Leszek Smelka, Zbigniew Kubica, Henryk Kozlowski, Barbara Rzeszotarska

Publikováno v: Polyhedron. 13:2683-2687

Ni II , Zn II and Co II complexes of α,β-dehydro-dipeptides (containing Gly, Leu, Ala, Val or Phe residues) were studied by potentiometric and spectroscopic methods. Deprotonation and coordination of amide nitrogens occurred in all cases around the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8c4442797a4a138a5ca639947860e52
https://doi.org/10.1016/s0277-5387(00)81321-2

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Coordination of copper(II) ions by α,β-dehydro-dipeptides. Potentiometric and spectroscopic study

Autor: I. Sovago, Małgorzata Jeżowska-Bojczuk, L. Smeł, Barbara Rzeszotarska, Zbigniew Kubica, H. Kozł, owski

Publikováno v: Polyhedron. 10:2331-2335

Potentiometric and spectroscopic data have shown that the double bond within dehydro-peptides considerably affects their behaviour as ligands relative to their saturated parents, with proton and copper(II) ions.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5a71666a48c5f5392f20199a3e253b45
https://doi.org/10.1016/s0277-5387(00)86157-4

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LOWER ALIPHATIC 2-OXOACIDS AND THEIR ETEYL ESTERS FROM ETHYL ESTERS OF 2-HYDROXY ACIDS

Autor: Leszek Smelka, Pietrzyński G, Zbigniew Kubica, Barbara Rzeszotarska, Roman Kozłowski

Publikováno v: Organic Preparations and Procedures International. 21:75-82

(1989). LOWER ALIPHATIC 2-OXOACIDS AND THEIR ETEYL ESTERS FROM ETHYL ESTERS OF 2-HYDROXY ACIDS. Organic Preparations and Procedures International: Vol. 21, No. 1, pp. 75-82.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::53fecc2ef4156f7ffb9c89b40ee1cbba
https://doi.org/10.1080/00304948909356349

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Synthesis of peptides with α,β-dehydroamino acids, VI. Synthesis ofN-benzyloxycarbonyl andN-trifluoroacetyl dipeptides of α,β-dehydro-butyrine, -valine, -leucine, and -isoleucine

Autor: Zbigniew Kubica, Leszek Smelka, Barbara Rzeszotarska, Pietrzyński G

Publikováno v: Liebigs Annalen der Chemie. 1988:485-486

Condensation of Z- and TFA-amino acid amides with 2-oxo-acids, namely butanoic, 3-methylbutanoic, 4-methylpentanoic, and (3RS)-3-methylpentanoic acid, yields (in the presence of p-toluenesulfonic acid as a catalyst) Z- and TFA-dipeptides with C-termi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6087ed005884b6ec4341408fe623a99e
https://doi.org/10.1002/jlac.198819880520

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