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Chemobiosynthese von neuen Terpenoiden

Tran, Cong Duc (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2022)

Terpenes represent the largest and structurally most diverse group of natural products. Since ancient times, humans have used terpenes contained in essential oils as medicinal agents, preservatives, and fragrances in their ...
High yield synthesis and structures of some achiral and chiral (diphosphine)tetracarbonylchromium(0) chelate complexes with tetracarbonyl(norbornadiene)chromium(0) as complexation reagent

Strotmann, Markus; Wartchow, Rudolf; Butenschön, Holger (Gainesville : Arkat USA, 2004)

Tetracarbonyl(norbornadiene)chromium(0) was used as complexation reagent in the synthesis of tetracarbonylchromium chelate complexes of dppe, dppb, dppf, DIOP, BINAP, and Tol-BINAP. In all cases the reactions took place ...
An improved synthesis of 4-chlorocoumarin-3-sulfonyl chloride and its reactions with different bidentate nucleophiles to give pyrido[1′, 2′:2,3]- and thiazino[3′,2′:2,3]-1,2,4-thiadiazino[6,5-c] benzopyran-6-one 7,7-dioxides

Jashari, Ahmed; Hey-Hawkins, Evamarie; Mikhova, Bozhana; Draeger, Gerald; Popovski, Emil (Basel : MDPI AG, 2007)

An improved synthetic method affording 4-chlorocoumarin-3-sulfonyl chloride (4) in very good yield (ca. 85 %) is reported. This compound was reacted with various bidentate nucleophiles such as 2-aminopyridines and ...
Interaction of lignans with human sex hormone binding globulin (SHBG)

Schöttner, M.; Ganßer, D.; Spiteller, G. (Berlin : De Gruyter, 1997)

Lignans bind to sex hormone-binding globulin (SHBG). The lignan with the highest binding affinity is (±)-3,4-divanillyltetrahydrofuran. In a double Stobbe condensation - without use of protecting groups - a wide variety ...
Introducing the crystalline phase of dicalcium phosphate monohydrate

Lu, Bing-Qiang; Willhammar, Tom; Sun, Ben-Ben; Hedin, Niklas; Gale, Julian D.; Gebauer, Denis (Berlin : Nature Research, 2020)

Calcium orthophosphates (CaPs) are important in geology, biomineralization, animal metabolism and biomedicine, and constitute a structurally and chemically diverse class of minerals. In the case of dicalcium phosphates, ...
Mechanosynthesis of nanocrystalline fayalite, Fe 2SiO 4

Šepelák, Vladimir; Myndyk, Maxym; Fabián, Martin; Da Silva, Klebson Lucenildo; Feldhoff, Armin; Menzel, Dirk; Ghafari, Mohammad; Hahn, Horst; Heitjans, Paul; Becker, Klaus-Dieter (Cambridge : Royal Society of Chemistry, 2012)

Nanostructured fayalite (α-Fe 2SiO 4) with a large volume fraction of interfaces is synthesized for the first time via single-step mechanosynthesis, starting from a 2α-Fe 2O 3 + 2Fe + 3SiO 2 mixture. The nonequilibrium ...
Metal-organic framework nanofibers via electrospinning

Ostermann, Rainer; Cravillon, Janosch; Weidmann, Christoph; Wiebcke, Michael; Smarsly, Bernd M. (Cambridge : Royal Society of Chemistry, 2011)

A hierarchical system of highly porous nanofibers has been prepared by electrospinning MOF (metal-organic framework) nanoparticles with suitable carrier polymers. Nitrogen adsorption proved the MOF nanoparticles to be fully ...
Microwave-assisted synthesis, characterization and modeling of cpo-27-mg metal-organic framework for drug delivery

Kudelin, Anton I.; Papathanasiou, Konstantinos; Isaeva, Vera; Caro, Juergen; Salmi, Tapio; Kustov, Leonid M. (Basel : MDPI AG, 2021)

The coordination polymer CPO-27-Mg was rapidly synthesized under microwave irra-diation. This material exhibits a sufficiently high drug loading towards aspirin (~8% wt.) and paracetamol (~14% wt.). The binding of these ...
Modellierung, Synthese und modellbasierte Bewegungsplanung hyperredundanter, binär aktuierter Manipulatoren

Spindeldreier, Svenja (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)

Die Untersuchung von schwer zu erreichenden Hohlräumen durch schmale Zugänge wird im technischen Umfeld als Boroskopie und in der Medizin als Endoskopie bezeichnet. Wenn neben der reinen Inspektion auch eine Manipulation ...
Optimizing dirhodium(II) tetrakiscarboxylates as chiral NMR auxiliaries

Mattiza, Jens T.; Fohrer, Joerg G.G.; Duddeck, Helmut; Gardiner, Michael G.; Ghanem, Ashraf (Cambridge : Royal Society of Chemistry, 2011)

Thirteen enantiopure paddlewheel-shaped dirhodium(II) tetrakiscarboxylate complexes have been checked for their efficiency in the dirhodium method (differentiation of enantiomers by NMR spectroscopy); six of them are new. ...
Osteogenic differentiation of human mesenchymal stem cells in 3-D Zr-Si organic-inorganic scaffolds produced by two-photon polymerization technique

Koroleva, Anastasia; Deiwick, Andrea; Nguyen, Alexander; Schlie-Wolter, Sabrina; Narayan, Roger; Timashev, Peter; Popov, Vladimir; Bagratashvili, Victor N.; Chichkov, Boris (San Francisco, CA : Public Library of Science, 2015)

Two-photon polymerization (2PP) is applied for the fabrication of 3-D Zr-Si scaffolds for bone tissue engineering. Zr-Si scaffolds with 150, 200, and 250 μm pore sizes are seeded with human bone marrow stem cells (hBMSCs) ...
Polymer-bound haloate(I) anions by iodine(III)-mediated oxidation of polymer-bound iodide: Synthetic utility in natural product transformations

Kirschning, Andreas; Kunst, Eike; Ries, Monika; Rose, Lars; Schönberger, Andreas; Wartchow, Rudolf (Gainesville : Arkat USA, 2003)

A set of polymer-attached hypervalent iodate(I) complexes were prepared from polymer-bound iodide anion by ligand transfer of acetate and trifluoro acetate present in the corresponding iodine(III) reagents onto the iodide ...
A portable biosensor for 2,4-dinitrotoluene vapors

Prante, Marc; Ude, Christian; Große, Miriam; Raddatz, Lukas; Krings, Ulrich; John, Gernot; Belkin, Shimshon; Scheper, Thomas (Basel : MDPI AG, 2018)

Buried explosive material, e.g., landmines, represent a severe issue for human safety all over the world. Most explosives consist of environmentally hazardous chemicals like 2,4,6-trinitrotoluene (TNT), carcinogenic ...
A practical synthesis of Rho-Kinase inhibitor Y-27632 and fluoro derivatives and their evaluation in human pluripotent stem cells

Paleek, Jiri; Zweigerdt, Robert; Olmer, Ruth; Martin, Ulrich; Kirschning, Andreas; Dräger, Gerald (Cambridge : Royal Society of Chemistry, 2011)

A practical synthesis of the Rho-Kinase inhibitor Y-27632 and two new fluoro derivatives was achieved in seven steps and with a good overall yield of 45% starting from commercially available (R)-1-phenylethylamine. Compared ...
Stepwise synthesis of sandwich-structured composite zeolite membranes with enhanced separation selectivity

Huang, Aisheng; Wang, Nanyi; Caro, Jürgen (Cambridge : Royal Society of Chemistry, 2012)

Sandwich-structured composite zeolite membranes with enhanced hydrogen selectivity were prepared on porous α-Al 2O 3 supports by using 3-aminopropyltriethoxysilane as an interlayer. © 2012 The Royal Society of Chemistry.
Studies with lysine N6-hydroxylase. Effect of a mutation in the assumed FAD binding site on coenzyme affinities and on lysine hydroxylating activity

Stehr, Matthias; Smau, Liliana; Singh, Mahavir; Seth, Oliver; Macheroux, Peter; Ghisla, Sandro; Diekmann, Hans (Berlin : De Gruyter, 1999)

The proposed FAD binding site of L-lysine N6-hydroxylase (EC 1.14.13.99) exhibits an unusual proline in a position where a highly conserved glycine is found in other FAD dependent hydroxylases. We have studied the role of ...
Targeting heat-shock-protein 90 (Hsp90) by natural products: Geldanamycin, a show case in cancer therapy

Franke, Jana; Eichner, Simone; Zeilinger, Carsten; Kirschning, Andreas (Cambridge : Royal Society of Chemistry, 2013)

Covering: 2005 to 2013 In this review recent progress in the development of heat shock proteins (Hsp90) in oncogenesis is illuminated. Particular emphasis is put on inhibitors such as geldanamycin and analogues that serve ...
Ten key issues in modern flow chemistry

Wegner, Jens; Ceylan, Sascha; Kirschning, Andreas (Cambridge : Royal Society of Chemistry, 2011)

Ten essentials of synthesis in the flow mode, a new enabling technology in organic chemistry, are highlighted as flashlighted providing an insight into current and future issues and developments in this field. © The Royal ...
Textursynthese und -analyse für Anwendungen der Kartographie und Luftbildauswertung

Stahlhut, Oliver (Hannover : Universität, 2004)

[no abstract]
Total synthesis of noricumazole B establishes D-arabinose as glycan unit

Barbier, Jenny; Gerth, Klaus; Jansen, Rolf; Kirschning, Andreas (Cambridge : Royal Society of Chemistry, 2012)

The total synthesis of noricumazole B, a secondary metabolite from myxobacteria, was achieved. It established the glycan moiety to be D-α-arabinoside. © The Royal Society of Chemistry 2012.

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