Browsing Fakultät für Chemie (inkl. GAUSS) by Referee "Alcarazo, Manuel Prof. Dr."
Now showing items 21-40 of 47
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Investigation of Peptidic Templates for Bioorthogonal Ligations
(2021-08-16)One of the biggest challenges for biochemical researchers in the postgenomic era remains the elucidation of structure-activity relationships in proteins. While many proteins can be routinely produced by recombinant protein ... -
Design and synthesis of small organic molecules to stabilize ALS-associated SOD1 mutants
(2021-06-25)Amyotrophic Lateral Sclerosis is a globally occurring neurodegenerative disease with serious implications for the patient’s life as well as imposing a heavy economic burden both on the affected individuals and society. Due ... -
Bioinspirierte Sauerstoffaktivierung an Bis(benzimidazolyl)basierten Kupfer(I)komplexen und Spektroskopische Studien an Bis(benzoxazolyl) Kupfer(II)-Verbindungen
(2021-05-04)The active sites of type III copper proteins (i.e. tyrosinase) provide inspiration for the development of copper complexes for the activation of O2 as well as for catalytic oxidation and oxygenation reactions of CH substrates. ... -
Approaches for Transition Metal-Free Photocatalytic Oxidation Reactions
(2021-04-30)The recent resurface of photocatalysis was accompanied by the technological and mechanistic improvements, which enabled new possibilities for chemical reactions to fulfill the target of green chemistry. The utilization of ... -
Resource-Economical Synthesis by Selective Metal-Catalyzed C–H Activations
(2021-04-30)The advent of new synthetic strategies has enriched the synthetic organic chemistry to access molecules with tremendous complexity. In this context, transition metal-catalyzed C−H activation has emerged as a powerful tool ... -
Selective C–H Activation by Ruthenium(II) Carboxylate and Nickelaelectro-Catalysis
(2021-01-28)This doctoral thesis was divided into two main parts. In the first part, ruthenium(II)-catalyzed ortho-C–H alkynylations of diverse benzoic acids were achieved for the synthesis of aromatic alkynes. And meta-C–H activations, ... -
C–H Activation by Iron(III), Manganese(II) and Rhoda(III)electro Catalysis
(2020-12-15)While major progress was realized with noble transition metal catalysts, the employment of cost-effective and earth-abundant 3d metals has gained significant momentum during the last decade. As stoichiometric amounts of ... -
N2 Splitting and Functionalization in the Coordination Sphere of Tungsten
(2020-12-02)The splitting and functionalization of N2 remains one of the most challenging reactions in coordination chemistry. In this thesis a series of four isostructural end-on N2 bridged ditungsten-PNP-pincer complexes are synthesized ... -
Transition Metal-Free Catalytic Systems for the Utilization of CO2 to Achieve Valuable Chemicals
(2020-11-03)The utilization of one of the most threatening greenhouse gases regarding the climate change could help changing its reputation from a harmful waste toward a green alternative feedstock. For the afore-mentioned reason, it ... -
Klassifizierung polarer Metall-Kohlenstoff-Bindungen in hauptgruppenmetallorganischen Verbindungen mittels experimenteller Elektronendichteanalyse
(2020-10-20)In general, organometallic compounds are characterized by their metal-carbon bond. This is characterized by its polar nature. Examples of this class of compounds are Grignard reagents and organolithium compounds such as ... -
Entwicklung regio- und enantioselektiver Transformationen an Alkenen mittels λ3-Iodan-Reagenzien bzw. chiraler Selen-π-Säure-Katalysatoren
(2020-09-02)In this thesis three novel oxidative functionalisations of alkenes are presented. The focus lay on the one hand on the development of the first aerobic phosphatation of alkens using a dual selenium-pi-acid-photoredox ... -
Novel Cationic Sulfur Reagents and their Application in Electrophilic Group-Transfer Reactions
(2020-06-08)The two major research achievements of this work are the development of novel sulfur-based electrophilic transfer reagents based on pyridinium, as well as the extension of the reactivity of already established imidazolium ... -
Sustainable Synthesis by 3d Transition Metal Electro-Catalyzed C─H Activation
(2020-01-20)During the last years, new opportunities are represented by the development of 3d transition metal-catalyzed C–H activation, with possible benefits due to the significantly lower toxicity, high natural abundance and ... -
Experimental and Computational Studies on Ruthenium- and Manganese-Catalyzed C-H and C-C Activation
(2019-11-07)During the last years, transition metal-catalyzed C–H and C–C activation has emerged as a powerful tool for the selective construction of C–C and C–Het bonds. In this context, a detailed mechanistic understanding of these ... -
Synthesis of rare nucleobases and artificial nucleotides for investigation of catalytic enzyme activity
(2019-10-25)Enzymes are involved in replication, transcription and translation of DNA, as well as the synthesis of nucleobases. The roles and mechanisms for many of these enzymes stay broadly unknown until today. The herein presented ... -
Selectivity Control in 3d Transition Metal-Catalyzed C–H Activation
(2019-08-23)Methods for the selective functionalization of otherwise inert C–H bonds have been recognized as a transformative tool in synthetic organic chemistry, with applications ranging from the synthesis of complex bioactive ... -
Investigations towards the design, synthesis and application of new sulfur-based transfer reagents
(2019-06-20)New dibenzothiophenium-based alkynylation reagents were prepared and their versatile reactivity was demonstrated in reactions with benchmark C-, S-, N- and P-nucleophiles. Straightforward experiments applying 13C-labeled ... -
Cobalt(III)- and Manganese(I)-Catalyzed C-H and C-C Activations
(2019-03-28)Metal-catalyzed C─H and C─C functionalizations have become an increasingly viable approach, which allows the direct formation of C─C and C─heteroatom bonds in an atom- and step-economical manner. However, the significant ... -
New Methodologies for the Regio- and Stereoselective Electrophilic Cyanation of Alkynes
(2019-01-04)The ability of sulfur imidazolium thiocyanates salts to serve as a remarkable source of cyano groups was tested, thus efficiently promoting cyanations of internal and terminal alkynes. The methods described are performed ... -
Late-Stage Peptide Functionalization by Ruthenium-Catalyzed C H Arylations and Alkylations
(2018-11-08)The thesis contents methods for the selective activation and functionalization of C–H bonds of the C2 position of a tryptophan moiety incorporated into peptides. Palladium-catalyzed C-H arylation reactions applying ...