Application of high-performance liquid chromatography/high-resolution mass spectrometry to the investigation of sodium 2,3-disulfanyl-1-propanesulfonate (unithiol) and products of its oxidation with hydrogen peroxide

High-performance liquid chromatography combined with high-resolution mass spectrometry has been used to study the mild oxidation of sodium 2,3-disulfanyl-1-propanesulfonate (unithiol) with hydrogen peroxide. Reference peaks have been identified for the initial substance and reaction products. A possibility of using high-performance liquid chromatography with high-resolution mass spectrometry for the Sokolovskii thiol–disulphide test has been shown.     

The Cu-catalyzed C–P coupling of phosphonate esters with arylboronic acids

Copper-catalyzed C–P cross coupling of phosphonate esters with arylboronic acids has been developed. The reaction provided an efficient method for aryl phosphonates under mild conditions.     

A Disulfide Intercalator Toolbox for the Site‐Directed Modification of Polypeptides

A disulfide intercalator toolbox was developed for site‐specific attachment of a broad variety of functional groups to proteins or peptides under mild, physiological conditions. The peptide hormone somatostatin (SST) served as model compound for intercalation into the available disulfide functionalization schemes starting from the intercalator or the reactive SST precursor before or after bioconjugation. A tetrazole–SST derivative was obtained that undergoes photoinduced cycloaddition in mammalian cells, which was monitored by live‐cell imaging.