Phenyltrimethylammonium Tribromide for Selective Oxidation of Sulfides to Sulfoxides. A Convenient Synthesis of Sulfinyl-18O-Labelled Sulfoxide Carboxylic Acids
A transition-metal-free olefinicC−Hazidoalkylthiolation protocol was developed through C(sp3)−Sbondcleavage of vinylsulfoniumsalts with sodium azide in air under aqueous conditions. An interrupted Pummerer/nucleophilc azidoalkylation cascade was developed for such a process. The practicability of the synthetic protocol was demonstrated by scale-up preparation of the azidoalkylthiolated tetrasubstituted