Imidazole → HCID 22048157, compound

Participants

Reaction Steps

4-Bromo-2,6-difluorophenol D1c (5.0 g, 24 mmol) is dissolved in dichloromethane (50 mL) and treated with imidazole (2.28 g, 33.5 mmol). The colorless solution is treated in portions, with stirring, with tert-butylchlorodimethylsilane (4 g, 26 mmol). The mixture is stirred at room temperature overnight. The mixture is diluted with water (150 mL) and extracted with dichloromethane. The organic phase is washed with sat. NH4Cl solution, dried over Na2SO4 and concentrated in vacuo. Purification of the crude material by flash chromatography (hexanes/ethyl acetate gradient) affords (4-bromo-2,6-difluorophenoxy)(tert-butyl)dimethylsilane D1d as a clear oil. 1H-NMR (400 MHz, CDCl3) δ=7.05 (d, J=7.2 Hz, 2H), 1.00 (s, 9H), 0.19 (s, 6H); no MS spectrum could be obtained.

Provenance & Evidence