Publication

Total asymmetric synthesis of advanced polyketide fragments of apoptolidinone and rectricticin using new organic chemistry of sulfur dioxide

Publications associées (34)

Asymmetric Total Synthesis of Indole Alkaloids (+)-Condyfoline, (-)-Tubifoline, (+)-Dasycarpidone and (+)-Uleine

The development of a titanium(III)-mediated cascade electrocyclisation/rearrangement for theenantioselective total synthesis of indole alkaloids (+)-condyfoline and (-)-tubifoline serve as the basisof the first chapter of this thesis. An introduction will ...

EPFL2022

Electric-Field-Driven Direct Desulfurization

Klaus Kern, Hagen Klauk, Uta Schlickum, Peter Wahl, Ivan Pentegov, Verena Katharina Schendel

The ability to elucidate the elementary steps of a chemical reaction at the atomic scale is important for the detailed understanding of the processes involved, which is key to uncover avenues for improved reaction paths. Here, we track the chemical pathway ...

Amer Chemical Soc2017

Organic-sulfur poisoning of solid oxide fuel cell operated on bio-syngas

Jan Van Herle, Christian Ludwig, Stefan Diethelm, Hossein Madi

This study experimentally analyzes the performance and degradation issues of an anode supported (AS) Ni-YSZ solid oxide fuel cell exposed to thiophene (C4H4S). The impact of this organic sulfur compound on the performance of SOFC Ni-YSZ anodes is reported ...

Elsevier2016

Development of Accurate and Efficient Electronic Structure Approaches for the Description of Organic Systems

Riccardo Petraglia

The overarching objective of this thesis is extending and adapting the set of computational tools available for describing molecular precursors of organic semiconductors. The research presented within develops adhering to three principle goals: (1) provide ...

EPFL2016

Sulfur containing organic compounds in the raw producer gas of wood and grass gasification

Christian Ludwig, Tilman J. Schildhauer

The detailed description of gas streams in biomass gasification plants is necessary for the correct design and operation of these units. Sulfur containing compounds are usually present in biomass gasification gas, since sulfur is typically found in the fee ...

Elsevier2014

Total Asymmetric Syntheses of beta-Hydroxy-delta-lactones via Umpolung with Sulfur Dioxide

Pierre Vogel, Maris Turks, Sylvain Claude Laclef, Claudia Jana Exner, Florent Poli

Cyclic stereotriads and stereotetrads of the beta-hydroxy-delta-lactone type, e.g. prelactones B and E, common in polyketides and polypropionates, are prepared via SO2-induced oxyallylations of enoxysilanes with (1E,3Z)-1-(1-phenylethoxy)penta-1,3-dien-3-y ...

2011

Impact of fuel quality regulation and speed reductions on shipping emissions: Implications for climate and air quality

Athanasios Nenes

Atmospheric emissions of gas and particulate matter from a large ocean-going container vessel were sampled as it slowed and switched from high-sulfur to low-sulfur fuel as it transited into regulated coastal waters of California. Reduction in emission fact ...

2011

Acidophilic bacteria in Deep Groundwaters of the Bohemian Cretaceous Basin after Extensive Uranium Leaching

Pierre Rossi

The Stráž pod Ralskem region is a part of the Bohemian Cretaceous Basin. The geological profile of the site consists of Quaternary river sediments, Middle Turonian sandstone, Lower Turonian siltstone and Cenomanian collector formed by friable sandstone con ...

2010

Sulfur as pollutant species on the cathode side of a SOFC system

Aïcha Hessler-Wyser

Sulfur poisoning in a strontium doped lanthanum cobaltite (LSC) cathode current collection layer was revealed in a solid oxide fuel cell (SOFC) tested in repeat-element and stack configuration. Sources of sulfur contamination, other than trace SOx in air, ...

2009

Studying sulfur functional groups in Norway spruce year rings using S L-edge total electron yield spectroscopy

Christian Ludwig, Rudolf Paul Wilhelm Jozef Struis

Profiles of the major sulfur functional groups in mature Norway spruce wood tissue have been established for the first time. The big challenge was the development of a method suitable for sulfur speciation in samples with very low sulfur content (

Elsevier2008

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