Conversion of Arylboronic Acids into Potassium Aryltrifluoroborates: Convenient Precursors of Arylboron Difluoride Lewis Acids
E. Vedejs, R. W. Chapman, S. C. Fields, S. Lin, M. R. Schrimpf
JOC, 1995, 3020–3027
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http://dx.doi.org/10.1021/jo00115a016