Two-Carbon Ring Expansion of Cyclobutanols to Cyclohexenones Enabled by Indole Radical Cation Intermediate: Development and Application to a Total Synthesis of Uleine
The first C2-selective alkynylation of indoles using the hypervalent iodine reagent triisopropylsilylethyny1-1,2-benziodoxol-3(1H)-one (TIPS-EBX) with Pd(II) as a catalyst is described. This convenient and robust method gives a single-step access to substi ...
In addition to the well-established nucleophilic alkynylation, the use of electrophilic alkynes can expand tremendously the scope of acetylene transfer reactions. The use of metal catalysis has recently led to a rebirth of this research area. Halogenoalkyn ...
The development of efficient synthetic methodologies is crucial to access complex molecules in an economic, eco-friendly and safe way. The reversal of the intrinsic reactivity of functional groups, called Umpolung, allows alternative synthetic strategies a ...
Carbon-carbon bond forming reactions are among the most important and useful methods for organic synthesis. During the last years, significant progress has been made in this field. Whereas many catalysts were developed for the coupling of aryl, alkenyl, an ...
This thesis is divided in seven main chapters including an introduction about the state of the art in the field, four main chapters describing the main part of the work, a short insight on the implications of the presented results for other research projec ...
The coiled coil is a superhelical protein structural motif that consists of two or more alpha-helical peptides that are wrapped around each other in superhelical fashion. Coiled coils are amongst the most ubiquitous folding motifs found in proteins and hav ...
A new pincer-type bis(amido)amine (NN2) ligand and its lithium and nickel complexes, including Ni(II) methyl, ethyl, and phenyl complexes, were synthesized. The Ni(II) alkyl complexes react cleanly with alkyl halides including chlorides to form C−C coupled ...
A misfolded conformer of the cellular prion protein, denoted as scrapie prion protein, is considered responsible for a variety of fatal neurodegenerative diseases. Both, the function of the protein in its native conformation as well as the factors that tri ...
A new method has been developed to obtain dynamic and structural information about peptide planes in proteins by a combination of measurements of weak short-range cross-correlation rates R(HNN/NC') that are due to concerted fluctuations of the HN-N and N-C ...
