Methanol → HCID 69435771, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of Example 30E (1.2 g, 2.5 mmol) in dichloromethane (20 mL) was added boron tribromide (0.95 mL, 10 mmol) at −78° C. Upon addition, the mixture was allowed to stir at 25° C. for 16 hours. The reaction was then cooled to 0° C., treated with methanol (5 mL) and diluted with dichloromethane (80 mL). The resulting mixture was washed with water (120 mL) and brine (150 mL). The organic layer was dried (MgSO4), filtered and concentrated. The concentrate was purified by flash chromatography on silica gel eluting with a solvent gradient from 20% to 60% ethyl acetate in hexanes to yield 900 mg of the title compound (77%) as a off-white solid. 1H NMR (300 MHz, DMSO-d6) δ ppm 1.81 (d, J=6.99 Hz, 3H) 5.55-5.70 (m, 1H) 6.84 (dd, J=8.82, 2.94 Hz, 1H) 6.99 (d, J=2.57 Hz, 1H) 7.17 (s, 1H) 7.42 (d, J=8.82 Hz, 1H) 7.80-7.98 (m, 5H); MS (ESI) m/z 468.0 (M+H)+, 500.0 (M+Na)+.

Provenance & Evidence