{"id":270,"date":"2020-12-09T19:20:47","date_gmt":"2020-12-09T19:20:47","guid":{"rendered":"https:\/\/info.ias.tuwien.ac.at\/bsc\/?page_id=270"},"modified":"2024-02-13T21:51:14","modified_gmt":"2024-02-13T21:51:14","slug":"schnuerch-lab","status":"publish","type":"page","link":"https:\/\/info.ias.tuwien.ac.at\/bsc\/schnuerch-lab\/","title":{"rendered":"Schnuerch Lab"},"content":{"rendered":"\t\t
The direct functionalization of C-H bonds is a hot and rapidly growing field in organic synthesis. Exploiting the C-H bond as \u201cfunctional group\u201d opens the door for more efficient and sustainable processes. Within this field, the activation of C(sp3<\/sup>)-H bonds is a particular challenge. In the past years we have developed several reactions under ruthenium, rhodium, copper, and iron catalysis realizing arylation, indolation, and alkylation reactions. Recently, our focus has shifted to the field of coupling two different C(sp3<\/sup>)-H bonds with each other, an even greater challenge.<\/p> The aim of this project is to incorporate small alkyl chains into more complex organic molecules using easy to handle reagents. The type of reagents preferred in organic synthesis is solid, non-toxic, non-corrosive, and stable for a prolonged period of time without special precautions. Unfortunately, the reagents currently in use for the introduction of short alkyl chains do not fulfill these criteria in many cases, since they are often gaseous, toxic, or corrosive or even a combination of the aforementioned undesirable properties. So, what to do, in case you want to use such reagents, but change their properties to make handling easier?<\/p> The hypothesis is that new reagents can be developed, which are solid and easy to handle themselves, but deliver in-situ the actual alkylation reagent, overall without experiencing the aforementioned unfavorable properties. For that purpose, we will look into several reagent classes, which can decompose under certain reaction conditions into reactive intermediates, which in turn can act as alkylating agents. Additionally, it has to be secured that the conditions required for liberating the alkylation reagent in-situ, are compatible with the other substrates, catalysts, and overall reaction conditions. The method development will start with selected test substrates and transformations, before the general scope of a certain method will be explored.<\/p> This research was initiated in the frame of a FFG \u201cLeitprojekt\u201d named Tes4seT \u2013 Thermal Energy Storage for Sustainable Energy Technology. In this project we were part of a large consortium of 18 partners and 5 development lines. The overall goal was to develop advanced thermal storage materials, thermal storage devices, numerical simulation tools and control systems to integrate these into energy systems in industry, for mobility applications and in buildings, in order to strengthen these sectors and bring the Austrian industry in a leading European position regarding advanced thermal energy storage. In our project part we cooperated with the Austrian Institute of Technology (AIT), the Austrian company SOLID and the German company S\u00fcdzucker AG. Our aim was to use derivatives of sugar alcohols to store energy via a phase transfer from the solid to the liquid phase and release it afterwards by inducing crystallization. It turned out that such sugar alcohols are not stable for the desired application, however at the end of the project we identified two new compound classes which have the desired properties.<\/p> This project is carried out in collaboration with Assoc. Prof. Margot Ernst from the Medical University of Vienna In the Ernst group biological testing is carried out and my group is charged with the chemical synthesis and lead optimization. The aim of the present project is the development and characterization of compound libraries that target a binding site of a GABAA<\/sub> receptors (gamma-amino butyric acid type A receptors) with a distinct subunit composition. GABAA<\/sub> receptors are the site of action of many clinically important drugs, such as benzodiazepines or barbiturates and the targets for sleep medications, anxiolytics, or various narcotics. In this collaborative effort we generate and investigate new compounds that interact with this site, try to understand the interactions that govern the ligated states and lead to allosteric modulation, and ultimately produce compounds exhibiting higher potency and selectivity for these binding sites for a possible future therapeutic application. Isotopic labelling for developing probe molecules is one of the next research plans on the agenda.<\/p> The direct functionalization of C-H bonds is a hot and rapidly growing field in organic synthesis. Exploiting the C-H bond as \u201cfunctional group\u201d opens the door for more efficient and sustainable processes. Within this field, the activation of C(sp3)-H bonds is a particular challenge. In the past years we have developed several reactions under ruthenium, rhodium, copper, and iron catalysis realizing arylation, indolation, and alkylation reactions. Recently, our focus has shifted to the field of coupling two different C(sp3)-H bonds with each other, an even greater challenge.<\/p><\/div>\n\t\t\t\t\t\t\t\t\t Research Lab – Michael Schn\u00fcrch\u00a0<\/p><\/div>\n\t\t\t\t\t\t\t\t\t Bj\u00f6rn received his PhD in medicinal chemistry in 2022 from University of Vienna under the Supervision of Prof. Dr. Dr. Bernhard Keppler and assoc.-Prof. Dr. Christian Kowol. During his PhD thesis he worked on the development and investigation of prodrug systems for chemotherapeutics. After working in the chemical industry for the last two years, he received research funding by the FWF and will perform his postdoctoral research under the guidance of Prof. Dr. Michael Schn\u00fcrch. His research focuses on the design of transition metal trigger moieties to develop novel kinds of prodrug systems <\/span>for tyrosine kinase inhibitors<\/span>.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t Nina obtained her Bachelor degree in chemistry at TU Wien in 2019 and then moved on to her Master studies. After spending a semester abroad at Uppsala Universitet (SE), she started her Master thesis in March 2020 under the supervision of Dr. Christian Stanetty and Prof. Dr. Michael Schn\u00fcrch. In the course of her thesis, Nina is working on the synthesis of non-natural sugar alcohols as promising substances in the field of phase change materials.<\/p>Solid substitutes for gaseous reagents:<\/h3>
Organic small molecules for energy storage:<\/h3>
Ligands for GABAA<\/sub> Receptors:<\/h3>
Direct functionalization of C(sp3<\/sup>)-H bonds:<\/h3>
Bielec,<\/span> Bj\u00f6rn (Postdoc)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Pourkaveh Dehkordi,<\/span> Raheleh (Postdoc)
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Biedermann,<\/span> Nina (PhD Student)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t