Dokumente Fakultät für Chemie (inkl. GAUSS) nach Titel
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Bandamycin as New Antifungal Agent and further Secondary Metabolites from Terrestrial and Marine Microorganisms
(2012-05-03)In this study, eight terrestrial and two marine bacteria, and four endophytic fungi have been investigated chemically and pharmacologically, out of which a total of fourty-eight secondary metabolites were isolated. ... -
Barriers of Protonation Reactions of Organometallics
(2023-09-20)Protonation reactions are entirely understood for simple organic and inorganic molecules and there are elaborated concepts to describe such acid-base reactions in both the solution and gas phase. For organometallic species, ... -
Ein Baukastensystem zum universellen Aufbau kleiner rigidifizierter Peptidomimetika und spirocyclopropanierter Wirkstoffanaloga
(2005-10-28)In contrast to the various synthetic accesses to biologically active peptidomimetics developed by other groups, we start from a single readily available class of building blocks. As in a ... -
Beiträge zur Biosynthese der antiparasitären Naturstoffe Hormaomycin und Borrelidin sowie Strukturaufklärung von Sekundärmetaboliten aus Actinomyceten
(2006-11-29)The core of the present thesis deals with studies of the natural products hormaomycin and borrelidin. Furthermore the isolation and structure elucidation of secondary metabolites from ... -
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 ... -
Beiträge zur Oxidationskatalyse
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Bestimmung und Modellierung der Initiatoreffektivität von Diazenen in der Ethen-Hochdruckpolymerisation
(2005-07-29)In this thesis the initiator efficiency of diazenes (azoalkanes), R-N=N-R', in the high-pressure ethene polymerization was determined in a continuously stirred tank reactor. The initiator ... -
Beta-Peptide Helices As Transmembrane Domains: Aggregation, Recognition and Lipid-Peptide Interaction
(2019-01-25)Plasma membranes are considered as the primary regulatory unit essential for efficient functioning of a cell. These membranes separate the inner part of the cell from the extracellular world as well as acts as a barrier ... -
Bifunctional Thiourea-Based Organocatalysts for Asymmetric C-C Bond Formation Reactions: Strecker, Nitro-Michael, Mannich
(2007-12-11)A variety of new thiourea-based organocatalysts were synthesized and tested on different important C-C bond forming reactions: Strecker-reaction, Michael-addition, and Mannich-reaction. The ... -
Bildgebung und chemische Analytik mit Laserdesorptions-Massenspektrometrie im Bereich Forensik und Astrophysik
(2011-09-16)Laserdesorption is a versatile method and an essential tool in bioanalytical mass spectrometry. In this work it was used for the following distinct topics. The first ... -
Bimetallic Complexes for Cooperative Polymerization Catalysis
(2018-09-07)This work contributed to the understanding of cooperativity in bi- and oligometallic complexes through three chapters. The first chapter on CO2/epoxide copolymerization led to the discovery of several promising novel ... -
Bimetallic Copper Complexes for Bioinspired Dioxygen Activation and Catalytic Water Oxidation
(2018-01-26)In this thesis a pyrazolate based dicopper(I) complex featuring a constrained substrate binding pocket was reacted with dioxygen to form a dicopper(II) peroxo complex which shows the peroxide anion in an unusual cis-µ-η1:η1 ... -
Binary Planet–Satellite Nanostructure Using RAFT Polymer
(2020-08-06)This thesis provides a series of strategies to fabricate hierarchically arranged nanohybrids from distinct nanoparticles using polymer linkers. Benefit from the controlled reversible-deactivation radical polymerization ... -
Binuclear late transition metal complexes with pyrazole based compartmental ligands: Scaffolds for cooperative organometallic transformations
(2014-10-10)A series of pyrazolate based ligands with 3,5-substituted side arms on the heterocycle have been established as valuable synthons for the preparation of highly compartmentalized bi- and oligonuclear metal complexes. Homo- ... -
Bioactive Secondary Metabolites from Marine and Terrestrial Bacteria: Isoquinolinequinones, Bacterial Compounds with a Novel Pharmacophor
(2005-01-17)After a chemical and biological pre-screening of bacterial extracts, 17 Streptomycetes (including eleven terrestrial and six marine-derived strains) and ten North Sea bacteria (including ... -
Bioinspired Activation of Oxygen with Pyrazole-Supported Dinuclear Copper Complexes
(2016-10-10)A series of compartmental pyrazole-bridging ligands were successfully used to gain insights into copper-mediated dioxygen activation chemistry, and thus expand on the proven potential of these organic scaffolds for emulating ... -
Bioinspired dinuclear copper complexes for catalytic oxidation of phenolic substrates
(2018-10-23)Inspired by tyrisonase, a dicopper enzyme catalyzing the aerobic oxidation of phenols, highly preorganized bioinspired dinuclear copper complexes with imidazole ligation were synthesized and their reaction with phenolic ... -
Bioinspired Dinuclear Copper Complexes for Oxygen Activation
(2022-12-06)This thesis explores new bioinspired bimetallic copper complexes for the activation of dioxygen. Therefore, two novel TACN/pyrazolate ligand scaffolds with reduced steric hindrance were introduced and successfully established. ... -
Bioinspired Dinuclear Copper Complexes for Small Molecule Activation
(2021-09-06)This thesis focuses on the activation of small molecules by dinuclear copper complexes. Initially, isolation of copper/oxygen intermediates on the basis of a non-symmetric pyrazolate/tacn scaffold was investigated. The ... -
Bioinspired dioxygen activation with copper complexes supported by Bis(oxazoline) and Bis(benzimidazole) ligands
(2023-06-20)Many synthetic complexes modeling the oxy form of the tyrosinase have been developed and have shown a preference for either the side-on peroxodicopper(II) (P) or the bis(-oxo)dicopper(III) (O) core depending on the ...