Jerome Lozada, Wen Xuan Lin, Rosana M Cao-Shen
Jan 31, 2023
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Journal
Angewandte Chemie
Abstract
Tetrafluoroborate (BF4-) has long been used as a spectator counter anion. Herein, we report an unprecedented salt metathesis between a variety of BF4- salts and a series of organoboronic acids yielding the corresponding organotrifluoroborates. We identified conditions for fast and efficient fluoridation (<1 h) with minimal workup. Fundamentally, this work discloses the proclivity of BF4- to exchange fluoride atoms with organoboronates, highlighting the lability of BF4-.