A new and versatile approach for the stereospecific iodination of alkynes has been developed in aqueous media. Scale-up reactions (up to 5 g) established the proficiency of this protocol and highlight the feasibility of large scale reactions.
In the vibrant field of SF5 chemistry, SF5X reagents (X=F, Cl, Br) are at the heart of current investigations in radical pentafluorosulfanylation reactions. SF5I is the missing link whose existence has not been reported despite its potential as SF5 donor. This study reports the formal addition of the hitherto unknown SF5I reagent to alkynes by means of a combination of SF5Cl/KI/18‐crown‐6 ether. The exclusive regio‐ and stereoselective synthesis of unprecedented (