Inside Back Cover: Salt Metathesis: Tetrafluoroborate Anion Rapidly Fluoridates Organoboronic Acids to give Organotrifluoroborates (Angew. Chem. Int. Ed. 16/2023)

Abstract

Salt metathesis ……a nd BFX (boron-fluoride exchange) of BF 4À with boronic acids generates RBF 3 À derivatives,t hus showing the solvolytic lability of BF 4 À that enables its use as a fluorinating agent, even though many highly reactive reagents employ BF 4À as an onreactive counteranion. In their Research Article (e202215371), David M. Perrin and coworkers report the synthesis of RBF 3 À derivatives via asalt metathesis reaction using a series of MBF 4 salts in methanol. This work highlights the proclivity of BF 4 À ,generally considered weakly coordinating and unreactive,torapidly fluorinate boronic acids.