Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Thomas Dülcks"'
Autor:
Vyacheslav Ya. Sosnovskikh, Andrey V. Didenko, Thomas Dülcks, Johannes Stelten, Dmitri V. Sevenard, Michael Vorobiev, Denis Lorenz
Publikováno v:
Tetrahedron. 73:1495-1502
A simple and reliable method for the preparation of 2,2-dimethyl-5-(trifluoroacetyl)-1,3-dioxane-4,6-dione and 2,2-dimethyl-6-(trifluoromethyl)-4H-1,3-dioxin-4-one on a multigram scale was developed. These (trifluoroacetyl)ketene precursors were used
Publikováno v:
Rapid Communications in Mass Spectrometry. 30:985-991
Rationale Direct atomic composition determination of ions with very broad Gaussian-shaped isotopic patterns is challenging because no monoisotopic peak is available for high accurate mass determination and no characteristic shapes in isotopic pattern
Autor:
Peter Spiteller, Axel Treu, Hans-Martin Schiebel, Dorit Kemken, Thomas Dülcks, Miriam Rittner
Publikováno v:
Journal of Mass Spectrometry. 50:978-986
The fragment spectra of protonated nitro-substituted benzodiazepines show an unusual fragment [M + H - 14]+ , which is shown by accurate mass measurement to be due to the loss of a nitrogen atom. Our investigations show that this apparent loss of ato
Publikováno v:
Tetrahedron Letters. 55:741-744
We report the synthesis of tripodal receptors with monopyrrolo-tetrathiafulvalene arms 1a , b , based on 1,3,5-substituted 2,4,6-triethylbenzene scaffold. The three converging pyrrolotetrathiafulvalene groups form an electron rich cone-shaped binding
Autor:
Martin J. Warren, Gunhild Layer, Johannes Walther, Dorit Kemken, Hans Martin Schiebel, Judith Müller, Thomas Dülcks, Vina Parmar, Sonja Storbeck
Publikováno v:
FEBS Journal. 276:5973-5982
Biosynthesis of heme d1, the essential prosthetic group of the dissimilatory nitrite reductase cytochrome cd1, requires the methylation of the tetrapyrrole precursor uroporphyrinogen III at positions C-2 and C-7. We produced Pseudomonas aeruginosa Ni
Autor:
Olesya Kazakova, Dmitri V. Sevenard, Gerd-Volker Röschenthaler, Thomas Dülcks, Dmitri L. Chizhov, Enno Lork
Publikováno v:
Journal of Molecular Structure. 846:87-96
4-Phenyl-2,6-bis(trifluoroacetyl)cyclohexanone and its dilithium salt were synthesized starting from the commercially available 4-phenylcyclohexanone. With X-ray structure analysis of these compounds, for the first time the solid state structure dete
Autor:
Beate Röder, Dieter Wöhrle, Christian Litwinski, Olga Tsaryova, Sergey G. Makarov, Eugeny A. Ermilov, O. N. Suvorova, Thomas Dülcks
Publikováno v:
European Journal of Inorganic Chemistry. 2007:546-552
Isomeric linear and rectangular trinuclear metal-free andzinc(II) phthalocyanine complexes connected by common annulated benzene rings have been synthesized by the mixed cyclotetramerization of a 1,2,4,5-tetracyanobenzene derivative and 4,5-bis(2,6-d
Autor:
Axel, Treu, Miriam, Rittner, Dorit, Kemken, Hans-Martin, Schiebel, Peter, Spiteller, Thomas, Dülcks
Publikováno v:
Journal of mass spectrometry : JMS. 50(8)
The fragment spectra of protonated nitro-substituted benzodiazepines show an unusual fragment [M + H - 14]
Autor:
Marcus Böckmann, Thomas Dülcks, Jens Cordes, Dirk Schlüter, Nikos L. Doltsinis, Vladimir A. Azov
Publikováno v:
The Journal of organic chemistry. 79(23)
Macrocyclization between tetrathiafulvalene (TTF) dithiolates and bis-bromomethylazobenzenes/bis-bromomethylstilbenes is investigated under high dilution conditions. We show that macrocycles of different size can be formed depending on whether the (Z
Autor:
Walter Grahn, Thomas Dülcks, Miriam Rittner, Hans-Martin Schiebel, Peter Schulze, Hans-Hermann Johannes, Ulf Lawrentz
Publikováno v:
Zeitschrift für Naturforschung B. 57:393-398
Fast atom bombardment (FAB) has been used for mass spectrometric characterization of oligomeric cyanines and squaraines of the indole series which are linked by different aromatic spacers. Markedly different results were obtained for the oligomers an