Scope of alkyl phenyl ketones^a.

^aYields were determined by ¹H NMR using 1,1,2,2-tetrachloroethane as an internal standard. Isolated yields after silica gel column chromatography were depicted in parentheses.

^b100 °C, 8 h.

^c3.0 equiv. HBpin.

^dThe borylation product was isolated as PhBF₃K instead of 2a by the treatment of the crude mixture with KHF₂.