1,168 research outputs found
Beate Sigriddaughter’s Story of Sigrid
No full textdeath of childNorth VancouverteachingWorld War II1910’sEurop
Merging Tribenzotriquinacene and Triptycene
No full textLucchesini F, Grasse M, Neumann B, Stammler H-G, Tellenbroeker J, Kuck D. Merging Tribenzotriquinacene and Triptycene. EUROPEAN JOURNAL OF ORGANIC CHEMISTRY. 2016;2016(16):2828-2841.The geometric and chemically related structural motifs of tribenzotriquinacene (TBTQ, 1) and triptycene (2) have been merged for the first time on the level of the parent hydrocarbons. A classical cyclodehydration strategy was used to synthesize 1,4-dimethoxytribenzotriquinacene 13 and convert it into the corresponding TBTQ-based para-benzoquinone 4. The Diels-Alder reaction of 4 with anthracene afforded anti-and syn-cycloadducts 22 and 23, respectively, in the ratio of 1: 3, which were transformed into dibenzo(triptyceno) triquinacene 5, a new parent polycyclic aromatic hydrocarbon, and derivatives 25-28. The structure of TBTQ-quinone 4 was also extended to give related 1,4-anthraquinone 32. The intriguing geometrical and structural aspects of the merged TBTQ-triptycene motif were examined by X-ray crystal analysis and molecular modeling with the aim to construct tris(triptyceno) triquinacenes, hypothetical analogues that are characterized by a deep molecular cavity
[Rezension zu:] Beate Burtscher-Bechter, Peter W. Haider, Birgit Mertz-Baumgartner u. Robert Rollinger (Hg.): Grenzen und Entgrenzungen
No full textRezension zu Beate Burtscher-Bechter, Peter W. Haider, Birgit Mertz-Baumgartner u. Robert Rollinger (Hg.): Grenzen und Entgrenzungen. Historische und kulturwissenschaftliche Überlegungen am Beispiel des Mittelmeerraumes. Würzburg (Königshausen & Neumann) 2006 (=Saarbrücker Beiträge zur vergleichenden Literatur- und Kulturwissenschaft, Bd. 36). 372 S
Effective Protein Interactions in a Coarse-Grained Model for Lipid Membranes
No full textWest B, Schmid F. Effective Protein Interactions in a Coarse-Grained Model for Lipid Membranes. In: Münster G, Wolf D, Kremer M, John-von-Neumann-Institut für Computing, eds. NIC Symposium 2008. NIC Series. Vol 39. Jülich: John von Neumann Institute for Computing; 2008: 271-278
Fig. 6 in Three phragmalin-type limonoids orthoesters and the structure of odoratone isolated from the bark of Entandrophragma candollei (Meliaceae)
No full textFig. 6. Structure and ORTEP-like view of scopoletin (6).Published as part of Mouth, Gervais, Happi, e, Kemayou, Guy Paulin Mouthe, Stammler, Hans-Georg, Neumann, Beate, Ismail, Mohamed, Kouam, Simeon Fogue, Wansi, Jean Duplex, Tchouankeu, Jean Claude, Frese, Marcel, Lenta, Bruno Ndjakou & Sewald, Norbert, 2021, Three phragmalin-type limonoids orthoesters and the structure of odoratone isolated from the bark of Entandrophragma candollei (Meliaceae), pp. 1-11 in Phytochemistry (112537) 181 on page 6, DOI: 10.1016/j.phytochem.2020.112537, http://zenodo.org/record/829133
Fig. 7 in Three phragmalin-type limonoids orthoesters and the structure of odoratone isolated from the bark of Entandrophragma candollei (Meliaceae)
No full textFig. 7. Acetonide formation of compound 5.Published as part of Mouth, Gervais, Happi, e, Kemayou, Guy Paulin Mouthe, Stammler, Hans-Georg, Neumann, Beate, Ismail, Mohamed, Kouam, Simeon Fogue, Wansi, Jean Duplex, Tchouankeu, Jean Claude, Frese, Marcel, Lenta, Bruno Ndjakou & Sewald, Norbert, 2021, Three phragmalin-type limonoids orthoesters and the structure of odoratone isolated from the bark of Entandrophragma candollei (Meliaceae), pp. 1-11 in Phytochemistry (112537) 181 on page 6, DOI: 10.1016/j.phytochem.2020.112537, http://zenodo.org/record/829133
Three phragmalin-type limonoids orthoesters and the structure of odoratone isolated from the bark of Entandrophragma candollei (Meliaceae)
No full textMouth, Gervais, Happi, e, Kemayou, Guy Paulin Mouthe, Stammler, Hans-Georg, Neumann, Beate, Ismail, Mohamed, Kouam, Simeon Fogue, Wansi, Jean Duplex, Tchouankeu, Jean Claude, Frese, Marcel, Lenta, Bruno Ndjakou, Sewald, Norbert (2021): Three phragmalin-type limonoids orthoesters and the structure of odoratone isolated from the bark of Entandrophragma candollei (Meliaceae). Phytochemistry (112537) 181: 1-11, DOI: 10.1016/j.phytochem.2020.112537, URL: http://dx.doi.org/10.1016/j.phytochem.2020.11253
Ein einfaches Verfahren zur vollständigen Methylierung der [alpha]-Positionen einiger Ketone
No full textLissel M, Neumann B, Schmidt S. Ein einfaches Verfahren zur vollständigen Methylierung der [alpha]-Positionen einiger Ketone. Liebig's Annalen der Chemie. 1987;1987(3):263-264
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