Hydrochloric Acid → HCID 89656488, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of Example 278a (0.20 g, 0.44 mmol) in tetrahydrofuran (6 mL) at 0° C. was added methylmagnesium bromide (1.0 M in tetrahydrofuran, 0.873 mL, 0.873 mmol). The reaction mixture was stirred at 0° C. for one hour, and then 1M aqueous HCl (2 mL) was added. The reaction mixture was concentrated and partitioned between saturated aqueous sodium chloride (10 mL) and ethyl acetate (2×30 mL). The combined organic phase was washed with saturated aqueous sodium chloride (30 mL), dried over anhydrous sodium sulfate, filtered, and concentrated. The residue was purified by preparative thin layer chromatography (silica gel, dichloromethane/methanol, 15/1) to provide the title compound (51 mg, 24% yield). 1H NMR (400 MHz, DMSO-d6) δ ppm 11.83 (s, 1H), 7.96 (d, J=2.4 Hz, 1H), 7.86 (dd, J=2.4, 6.4 Hz, 1H), 7.55-7.50 (m, 1H), 7.42-7.36 (m, 2H), 7.20-7.15 (m, 1H), 6.97 (d, J=8.8 Hz, 1H), 6.15 (d, J=2 Hz, 1H), 5.13 (d, J=5.2 Hz, 1H), 4.80-4.77 (m, 1H), 3.57 (s, 3H), 3.25 (s, 3H), 1.38 (d, J=6.4 Hz, 3H). MS (ESI+) m/z 475.1 (M+1)+.

Provenance & Evidence