How is [3-Methyl-5-(trifluoromethyl)phenyl]boronic acid (CAS: 850411-13-1) typically synthesized?

[3-Methyl-5-(trifluoromethyl)phenyl]boronic acid (CAS: 850411-13-1) is commonly synthesized via the Grignard reaction followed by the boronation of the phenolic ring. The process involves reacting a Grignard reagent with 3-methyl-5-(trifluoromethyl)benzaldehyde in an ether solvent, followed by treatment with boron tribromide or boron triiodide to generate the boronic acid derivative.