Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Hans-Dietrich Stachel"'
Autor:
Helmar Görls, Rami A. Abdel-Rahem, Ahmad Q. Daraosheh, Hans-Dietrich Stachel, Hassan Abul-Futouh, Wolfgang Weigand
Publikováno v:
Zeitschrift für anorganische und allgemeine Chemie. 647:931-936
Autor:
Christa E. Müller, Hans-Dietrich Stachel, Raghuram Rao Akkinepally, Hermann Poschenrieder, Anke C. Schiedel, Meryem Köse, Alexander Andreas Bauer, Joachim C. Burbiel
Publikováno v:
Bioorganicmedicinal chemistry. 24(21)
Adenosine kinase (AdK) is a key player in controlling intra- and extracellular concentrations of the signaling molecule adenosine. Extensive evidence points to an important role of AdK in several diseases, and suggests that AdK inhibition might be a
Autor:
Hans-Dietrich Stachel, Eduard Eckl, Sabine Jax, Hermann Poschenrieder, Kurt Polborn, Peter Mayer
Publikováno v:
Helvetica Chimica Acta. 89:971-982
Ozonations of alkoxy- and (acyloxy)-substituted alkylidene-lactams 1 and 5 or of the alkylidene-sultams 9 and 10 proceeded by regioselective cleavage of the exocyclic CC bonds (Schemes 1 and 2). These bonds are part of an enamide system and, therefor
Publikováno v:
Liebigs Annalen. 1996:103-107
The synthesis of the hitherto unknown aza analog of ascorbic acid (±)-10a is described. Aldol type reaction of the tetramic acid derivative 4 with tert-butyldimethylsilyloxy acetaldehyde furnished a mixture of the aldol (±)-5b and the diastereomeri
Autor:
Eduard Eckl, Peter Mayer, Wolfgang Weigand, Barbara Zimmer, Hans-Dietrich Stachel, Ralf Wünsch, Katharina Semmlinger
Publikováno v:
Helvetica Chimica Acta. 88:1208-1220
The 1,2-dithiolosultam derivative 14 was obtained from the (α-bromoalkylidene)propenesultam derivative 9 (Scheme 1). Regioselective cleavage of the two ester groups (1b or 2b) allowed the preparation of derivatives with different substituents at C(3
Publikováno v:
European Journal of Medicinal Chemistry. 40:391-400
A series of oximes, deriving from 2-arylidene-pyrroline-3,4-diones (7, 8, 22, 23) has been prepared. The presence of tautomers in their solutions has been established by spectroscopic means. The compounds reacted with diazomethane chiefly by N-methyl
Autor:
Wolfgang Weigand, Hans-Dietrich Stachel, Andreas Windt, Hermann Poschenrieder, Elisabeth Immerz-Winkler, Ralf Wünsch, Norbert Drescher
Publikováno v:
Helvetica Chimica Acta. 86:2471-2480
The title compounds were prepared starting from the dihydropyrrolones 4–6. Nucleophilic displacement and ring closure yielded the 1H-pyrrolo[3,2-c]isothiazol-5(4H)-ones 8 and 10. The fused systems formed salts with strong acids and electrophiles (1
Publikováno v:
Journal of Heterocyclic Chemistry. 40:61-69
Ozonolysis of the pyrrolidinediones 4 afforded the pyrrolidinetriones 5, which in the presence of Lewis acids were converted into maleimide 6. Analogously, ozonolysis of the pyrrolidinones 7 gave the pyrrolidinediones 8, which were converted into the
Autor:
Hans-Dietrich Stachel, Ralf Wünsch, Christian Robl, Stefan Dick, Norbert Drescher, Christine Kreiner, Elisabeth Immerz-Winkler, Wolfgang Weigand, Eduard Eckl
Publikováno v:
Helvetica Chimica Acta. 85:4453-4467
The title compounds were prepared starting from pyrrolinone 4. Nucleophilic-displacement and ring-closure reactions yielded the dithiolopyrrole 5a, which formed salts with electrophiles (7, 8) as well as with bases. The crystal structure of 5a was de
Publikováno v:
Archiv der Pharmazie. 333:211-216
A series of piperidine-2,3,5-triones (azagrevelfins) has been prepared. A new synthesis has been introduced using the rearrangement of spiroepoxides in the presence of triethyloxonium tetrafluoroborate. The binding affinity toward the N-methyl-D-aspa