Preparation of Organotrifluoroborate Salts: Precipitation-Driven Equilibrium under Non-Etching Conditions

Simple, rapid, and scaleable: In contrast to current procedures using corrosive HF/MF or MHF2 reagents (M=e.g. K), a wide range of trifluoroborates can be rapidly, simply, and safely prepared from MF (M=K, Cs), RCO2H, and a boronic acid/ester in regular glassware (see figure; left versus right). The...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2012-09, Vol.51 (37), p.9385-9388
Main Authors: Lennox, Alastair J. J., Lloyd-Jones, Guy C.
Format: Article
Language:English
Subjects:
boron
Boronic Acids - chemical synthesis
Boronic Acids - chemistry
Cesium - chemistry
Esters
Evaporation
fluorine
Fluorine - chemistry
Glassware
Potassium - chemistry
Salts - chemistry
Sponges
synthetic methods
tartaric acid
Tartrates - chemistry
trifluoroborates
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Summary:Simple, rapid, and scaleable: In contrast to current procedures using corrosive HF/MF or MHF2 reagents (M=e.g. K), a wide range of trifluoroborates can be rapidly, simply, and safely prepared from MF (M=K, Cs), RCO2H, and a boronic acid/ester in regular glassware (see figure; left versus right). The use of L‐(+)‐tartaric acid as an alkali‐metal sponge is key and allows isolation of RBF3M by a simple stir/filter/evaporate sequence.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201203930