Browsing Fakultät für Chemie (inkl. GAUSS) by Referee "Magull, Jörg Prof. Dr."
Now showing items 1-20 of 23
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Nafisamycin, Cyclisation Product of a New Enediyne Precursor, Highly Cytotoxic Mansouramycins, Karamomycins Possessing a Novel Heterocyclic Skeleton and Further Unusual Secondary Metabolites from Terrestrial and Marine Bacteria.
(2009-03-19)The search for new medically active compounds to overcome the countless diseases is one of the most relevant objectives worldwide. Medicinal plants were used previously in the traditional ... -
Synthese von Amino- bzw. Hydrazinosilanen und -boranen, Lithiumsalzen, Iminoborenen und Borkationen
(2008-01-29)The present dissertation discusses the synthesis and crystal structures of two dilithiumsilylamides that can be purified by destillation. Apart from studies of thermal and anionic silyl ... -
Neuartige Pyrrol/Pyrazol-Bausteine für die Synthese von Hybrid-Makrozyklen, azyklischen Ligandsystemen und bimetallischen Komplexen
(2007-11-30)The present work focussed on the synthesis of a versatile pyrrole-pyrazole key building block (3,5-bis-(3,4-diethyl-1-formylpyrrol-2-ylmethyl)-1H-pyrazol), and its application in the synthesis ... -
New synthetic pathways to mono- and bis-dithiolene compounds of molybdenum and tungsten related to the active sites of the molybdopterin containing oxidases
(2007-08-09)The synthesis, structures and oxygen atom transfer properties of molybdenum and tungsten compounds with mono- and bis(dithiolene) and its related chalcogenide ligands have been investigated. ... -
Pyrazolbasierte zweikernige Zink(II)-Komplexe als Modellsysteme zum Verständnis der Rolle des Zinks in enzymatischen Reaktionen
(2006-11-27)The present work deals with the assembly and the reactivity of dinuclear zinc complexes based on preorganizing compartimental ligands, obtained from bifunctional 3,5-dimethylpyrazol. A ... -
Synthese und Untersuchung von Alanyl-PNA Oligomeren und deren Einfluß auf β-Faltblatt Strukturen
(2006-08-01)The activity and properties of proteins mainly depend on the three-dimensional arrangment of their secondary structure elements and their conformation. Conformational changes as well as ... -
Synthesis, Spectral Studies, Structural Elucidation and Magnetic Properties of Metallasiloxanes containing Main Group and Transition Metals
(2006-04-27)In recent years, metallasiloxanes have been shown as potential model compounds for zeolites. In view of this, the synthesis and characterization of novel metallasiloxanes are of paramount ... -
One-pot, Two-step Queuing Cascades Involving a Heck Coupling, π-Allylpalladium Trapping and Diels-Alder Reaction
(2006-01-23)In the first part of this study, palladium catalyzed reactions of mono-substituted bicyclopropylidenes (66B E) with iodobenzene (67) in the presence of dienophiles 68a b have been performed. ... -
Pyrazolliganden mit Imin-Seitenarmen und ihre zweikernigen Palladium(II)- und Nickel(II)-Komplexe: neue bimetallische Katalysatoren für die Olefinpolymerisation
(2006-01-10)A series of compartmental pyrazole/imine dinucleating ligands (L) with various backbone substituents and different steric bulk of the appended aryl imine groups has been prepared. With ... -
Crystallographic studies on Echinomycin bisintercalation on DNA and an alternating D-alanyl,L-homoalanyl PNA.
(2005-12-09)SUMMARYStructures of echinomycin in complex with double stranded DNAs. The structure of complexes between the antibiotic echinomycin and different short DNA duplexes have been ... -
Beiträge zur Biosynthese von Strobilurin A und Oudemansin A sowie Gewinnung neuer halogenierter Strobilurine durch vorläufer-dirigierte Biosynthese
(2005-09-26)The integral part of this thesis are studies of the biosynthesis of the antifungal strobilurin A as well as experiments to modify the metabolite by precurser directed biosynthesis.Earlier ... -
Synthesis, Structural Characterization and Reactivity of homo- and heterobimetallic Imidoalanes and Carbaalanes, Aluminum Hydrazide and Aluminum Peroxide Compounds
(2005-02-16)In the present work, hydroalumination reactions were carried out successfully on nitriles and mono-substituted acetylenes in the synthesis of imidoalane and carbaalane cluster compounds. A ... -
Allene, Dihydronaphthalenon-Derivate und andere Sekundärmetabolite aus Pilzen mariner Habitate sowie Beiträge zu deren Biosynthese
(2004-12-15)The aim of this thesis was the isolation and structure elucidation of novel natural products from marine fungi as well as studies of their biosynthesis.Twelve fungal strains from marine ... -
Synthesis, Structures and Reactions of Aluminum(I) and Aluminum(III) Compounds
(2004-11-24)In this dissertation bulky bidentate salicylaldiminato, diketiminato, tert-butyl and adamantyl groups have been employed as supporting moieties to synthesize aluminum(I) and aluminum(III) ... -
Reaktionen des Bis(tert-butyl-methyl)ketazins mit Halogensilanen
(2004-10-22)This thesis refers to the synthesis of unknown acyclic und cyclic silylketazines. Reactions of monolithiated bis(tert-butyl-methyl)ketazine with chloro- and fluorosilanes lead to acyclic ... -
Chemisches Screening von ausgewählten Actinomyceten sowie Strukturaufklärung von Sekundärmetaboliten aus Micromonospora sp. und Pflanzen
(2004-04-27)The core of this thesis is the study of microorganisms and plants of different sources with regard to their production of secondary metabolites.The first part deals with 35 actinomycete ... -
Reaktionen des Amino-di-<i>tert</i>-butylsilanols
(2003-11-26)In contrast to carbon chemistry in silicon chemistry a kinetic stabilization of compounds with two or three OH or NH2 groups bonded to one silicon atom is possible. The reaction of (Me3C)2Si(OH)Cl with liquid ammonia affords ... -
Neue kovalent und ionogen aufgebaute Alkinylderivate mit Elementen der 13. Gruppe des Periodensystems
(2003-04-23)In spite of their synthetic use in organic chemistry, only a few alkynyl derivatives of group 13 metals are known in the literature and a very few of them are structurally characterized.In ... -
Cyclisierungsreaktionen mehrfach ungesättigter Systeme - Theorie und Experiment
(2002-07-29)This work brings some order to the great variety of the "cyclizations of polyunsaturated systems". In a first theoretical part, it is shown by means of computational chemistry that a big ... -
ps-UV-Pump REMPI-Probe Spektroskopie an <i>trans</i>-Stilben van-der-Waals-Clustern im Überschalldüsenstrahl
(2001-07-18)The reaction rate of the unimolecular trans-cis-isomerization of trans-stilbene in the first excited state (S1) is influenced by cluster formation. Photoinduced reactions of ...