Ammonium Chloride → 2-(2-Fluoro-3,4-dimethoxyphenyl)propan-2-ol

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Reaction Steps

A solution of methylmagnesium chloride (3M in THF, 1.74 mL, 5.22 mmol) was added dropwise to a stirred solution of 1-(2-fluoro-3,4-dimethoxyphenyl)ethanone (J. Chem. Soc. Perkin Trans. 2 1994, 547-555) (646 mg, 3.26 mmol) in heptane (3.1 mL) and THF (1.4 mL) at −20° C. under N2. The reaction was allowed to warm to room temperature and was stirred for 4 h. 50% Saturated NH4Cl (20 mL) was added and the mixture was extracted with EtOAc (3×20 mL). The combined extracts were dried (Na2SO4) and concentrated in vacuo to give 2-(2-fluoro-3,4-dimethoxyphenyl)propan-2-ol as a colorless oil. LCMS calc.=197.1; found=197.1 (M−OH)+. 1H NMR (600 MHz, CDCl3) δ 7.14 (t, J=8.8 Hz, 1H), 6.61 (dd, J=8.8, 1.4 Hz, 1H), 3.86 (s, 3H), 3.83 (s, 3H), 2.56-2.25 (br s, 1H), 1.58 (s, 6H).

Provenance & Evidence