Pentafluorosulfanyl acetylenic

Pentafluorosulfanyl acetylene is a useful starting reagent for the synthesis of a variety of SF5 derivatives of saturated ethers, vinyl ethers, pyrazoles, cyclic alkenes, and alkyl-substituted phenyl-sulfur pentafluorides (134). It is also used for the preparation of a number of F5S-containing alkenes and alkynes (138, 139). 

The SF5 group has become a focus of much recent attention in organofluorine chemistry. Shreeve and coworkers have also used click chemistry to prepare a series of SFs-substituted 1,2,3-triazoles by reaction of pentafluorosulfanyl acetylene with hydrazoic acid and substituted azides (Fig. 3.89). °... 

---