This work describes the tribochemical evaluation of vegetable oil based antiwear additive obtained through chemical modification. The Sulfur was incorporated using a chemical reaction of epoxidized vegetable oil and common thiols, resulting in formation of a hydroxy thioether derivative of vegetable oils. The synthesis retains the vegetable oil structure, eliminates poly-unsaturation in the mol...

The intramolecular carbothiolation of unsaturated hydrocarbons using a palladium–NHC catalyst (NHC = N-heterocyclic carbene) is described. Herein, single system enables both initial activation C(sp2)–S bond through oxidative addition and formation C(sp3)–S terminal reductive elimination, unlocking completely atom-economical transfer across alkenes. reaction tolerates variety different functiona...

The main limitation in the application of therapeutic peptides is their rapid degradation by proteolytic enzymes. Thioether-bridges in peptides confer strong resistance against proteolytic degradation, can modulate receptor interaction and extend delivery possibilities. Their enzymatic introduction is chemo-, regionand stereo-specific and allows the stabilization of medically and economically h...

We report the alkynylation of C(sp2)-H bonds with bromoalkynes (inverse-Sonogashira reaction) directed by synthetically useful ester, ketone, and ether groups under rhodium catalysis. Other less common directing groups such as amine, thioether, sulfoxide, sulfone, phenol ester, and carbamate are also suitable directing groups. Mechanistic studies indicate that the reaction proceeds by a turnove...

A simple method for synthesizing diphosphine monosulfide species was developed utilizing lithium sulfide and chlorophosphine starting materials. This afforded 1,1,2,2-tetraphenyldiphosphine monosulfide (1), as well as 1,1,2,2-tetracyclohexyldiphosphine monosulfide (2), which could be used as convenient ligand precursors. Upon addition of 1 or 2 to the ruthenium compound Ru(C5Me5)(cod)Cl, the di...