Reactions of Morita–Baylis–Hillman carbonates with metal-free sources of trifluoromethylthio anion have been studied. The combination of CF3SiMe3/S8/KF/DMF gave the primary allylic SCF3 products through apparent SN2′ reaction whereas the use of Zard’s reagent, CF3SCO2C18H37, allowed us to intercept the fleeting secondary allylic SCF3 product.
Key words
fluorine - sulphur - Morita–Baylis–Hillman adduct - substitution - stereocontrol