Benzoyl Peroxide → 2-(3-{[Tert-butyl-(dimethyl)silyl]oxy}-4-bromomethylphenyl)-1,3-benzoxazole

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To 2-(3-{[tert-butyl-(dimethyl)silyl]oxy}-4-methylphenyl)-1,3-benzoxazole (1.46 g, 4.3 mmol) in CCl4 (50 mL) was added NBS (770 mg, 4.3 mmol) and benzoyl peroxide (50 mg). The reaction mixture was refluxed for 6 h, cooled to rt, and CCl4 was removed in vacuo. The residue was dissolved in EtOAc (50 mL), washed with H2O (50 mL), dried (MgSO4), filtered and concentrated in vacuo to afford 2-(3-{[tert-butyl-(dimethyl)silyl]oxy}-4-bromomethylphenyl)-1,3-benzoxazole as light yellow solid.

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