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Cis–trans isomerism

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Related publications (31)

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Can Mutational Analysis Be Used To Assist Structure Determination of Peptides?

Thomas Rizzo, Valeriu Scutelnic, Chiara Masellis, Liudmila Voronina

Mutational analysis is widely used to study the relationship between sequence and structure of proteins and peptides. It is often assumed that substituting a proline with another amino acid "locks" the peptide bond in the trans conformation, allowing only ...

2018

Versatile coordination of acetazolamide to ruthenium(ii) p-cymene complexes and preliminary cytotoxicity studies

Paul Joseph Dyson, Lucinda Kate Batchelor

The carbonic anhydrase inhibitor acetazolamide (AcmH2) reacted with [(η6-p-cymene)RuCl(μ-Cl)]2 to afford [(η6-p-cymene)RuCl2(κN-AcmH2)], 1A, in near-quantitative yield. In methanol, 1A exists in equilibrium with 1B, being probably a coordination isomer, as ...

2018

Coexistence of two distinct Sulfurospirillum populations respiring tetrachloroethene—genomic and kinetic considerations

Christof Holliger, Julien Maillard, Géraldine Florence Buttet, Alexandra Marie Murray

Two anaerobic bacterial consortia, each harboring a distinct Sulfurospirillum population, were derived from a 10 year old consortium, SL2, previously characterized for the stepwise dechlorination of tetrachloroethene (PCE) to cis-dichloroethene (cis-DCE) v ...

FEMS Microbiology Ecology, Vol. 94, Issue 12018

Coexistence of two distinct Sulfurospirillum populations respiring tetrachloroethene-genomic and kinetic considerations

Christof Holliger, Julien Maillard, Géraldine Florence Buttet, Alexandra Marie Murray

2018

Dearomatization of electron poor six-membered N-heterocycles through [3+2] annulation with aminocyclopropanes

Jérôme Waser, Johannes Preindl, Shyamal Chakrabarty

Many abundant and highly bioactive natural alkaloids contain an indolizidine skeleton. A simple, high yielding method to synthesize this scaffold from N-heterocycles was developed. A wide range of pyridines, quinolines and isoquinolines reacted with donor- ...

2017

Fixation of nitrous oxide by mesoionic and carbanionic N-heterocyclic carbenes

Rosario Scopelliti, Kay Severin, Farzaneh Fadaei Tirani, Euro Solari, Léonard Yannick Maurice Eymann, Giacomo Cecot

A ditopic carbanionic N-heterocyclic carbene was found to react with the inert gas nitrous oxide, resulting in a stable covalent adduct with two intact N2O groups attached to the heterocycle. Mesoionic N-heterocyclic carbenes derived from C2-arylated 1,3-b ...

Royal Society of Chemistry2017

Intense fluorescence of Au-20

Harald Brune, Wolfgang Harbich, Chongqi Yu

Ligand-protected Au clusters are non-bleaching fluorescence markers in bio- and medical applications. Here we show that their fluorescence can be an intrinsic property of the Au cluster itself. We find a very intense and sharp fluorescence peak located at ...

American Institute of Physics2017

Stereoselective synthesis of alkenes via base-metal-catalyzed addition reactions to alkynes and activation of hydrogen peroxide and carbon dioxide by iron complexes

Fedor Zhurkin

Alkene functionality can be found in the majority of natural products, drugs, catalysts and organic materials. Therefore, methods of C-C double bond formation constitute a cornerstone of organic synthesis. Selective formation of either (Z)- or (E)-isomer i ...

EPFL2017

Conformations of prolyl-peptide bonds in the bradykinin 1-5 fragment in solution and in the gas phase

Thomas Rizzo, Michael Zachary Kamrath, Liudmila Voronina, Antoine Louis Claude Masson

The dynamic nature of intrinsically disordered peptides makes them a challenge to characterize by solution-phase techniques. In order to gain insight into the relation between the disordered state and the environment, we explore the conformational space of ...

Amer Chemical Soc2016

Remotely Controlled Isomer Selective Molecular Switching

Klaus Kern, Uta Schlickum, Ivan Pentegov, Verena Katharina Schendel

Non local addressing-the "remote control"- of molecular switches promises more efficient processing for information technology, where fast speed of switching is essential. The surface state of the (111) facets of noble metals, a confined two-dimensional el ...

Amer Chemical Soc2016

Gas-phase probes of kinetically trapped peptides

Liudmila Voronina

Gas-phase techniques are promising for studying intrinsically disordered peptides and proteins, as they can be implemented in a conformer-selective way. One of the issues that prevent them from finding a broader use is the question of to which extent the s ...

EPFL2016