A rapid, site-selective and efficient route to the dual modification of DARPins† †Electronic supplementary information (ESI) available: LC-MS spectra for all reactions with proteins described herein. See DOI: 10.1039/c4cc00053f Click here for additional data file.

A novel approach to the site-selective dual labelling of a protein via chemoselective cysteine modification† †Electronic supplementary information (ESI) available: LC-MS, ES-MS, deconvoluted spectra and fluorescence emission spectra for all reactions with proteins described herein. Fluorescence emission spectra of superfolder GFP, all the cysteine mutants and their derivatives are given. See DOI: 10.1039/c3sc51333e Click here for additional data file.

Local protein microenvironment is used to control the outcome of reaction between cysteine residues and 2,5-dibromohexanediamide. The differential reactivity is exploited to introduce two orthogonal reactive handles onto the surface of a double cysteine mutant of superfolder green fluorescent protein in a regioselective manner. Subsequent elaboration with commonly used thiol and alkyne containi...

3-Mercaptopropionic acid-mediated synthesis of peptide and protein thioesters† †Electronic supplementary information (ESI) available: Experimental procedures for the production of 1, all model peptides and proteins and their reactions with MPA including HPLC, LC-MS and NMR characterisation of selected products. See DOI: 10.1039/b815888f Click here for additional data file.

Peptides and proteins fragment sequence-specifically in the presence of 3-mercaptopropionic acid to afford thioesters which can be used in native chemical ligation reactions.

The total synthesis of K-252c (staurosporinone) via a sequential C–H functionalisation strategy† †Electronic supplementary information (ESI) available: 1H and 13C NMR spectra, and crystallographic data. CCDC 1431476. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c5sc04399a Click here for additional data file. Click here for additional data file.

A synthesis of the bioactive indolocarbazole alkaloid K-252c (staurosporinone) via a sequential C–H functionalisation strategy is reported. The route exploits direct functionalisation reactions around a simple arene core and comprises of two highly-selective copper-catalysed C–H arylations, a coppercatalysed C–H amination and a palladium-catalysed C–H carbonylation, which build up the structura...

Electrophilic bis-fluorophosphonium dications: Lewis acid catalysts from diphosphines† †Electronic supplementary information (ESI) available: Preparative, spectroscopic and analytical details for the experiments described herein. CCDC 1041558–1041565. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c5sc00051c Click here for additional data file. Click here for additional data file.

Systematic and site-specific analysis of N-sialoglycosylated proteins on the cell surface by integrating click chemistry and MS-based proteomics† †Electronic supplementary information (ESI) available: Supplementary text and references, six supplementary figures, and thirteen supplementary tables. See DOI: 10.1039/c5sc01124h Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file. Click here for additional data file.