Hydrofluoric Acid → HCID 11488566, compound

Participants

Reaction Steps

(3R,4S)-3-[(3S)-3-{[tert-Butyl(dimethyl)silyl]oxy}-3-(4-fluorophenyl)propyl]-4-(3,3′-dihydroxybiphenyl-4-yl)-1-phenylazetidin-2-one (73 mg, 0.122 mmol) was dissolved in acetonitrile (5 mL) and transferred to a polypropylene conical vial. 48% Hydrofluoric acid (1 mL) was added dropwise and the reaction stirred at room temperature for 1 h. The reaction was quenched with 1 N sodium hydroxide (24 mL) and transferred to a flask containing pH 7.4 phosphate buffer (24 mL). The pH of the solution was adjusted to 7.5-8.0 with saturated sodium bicarbonate solution then extracted with ethyl acetate (3×). The combined organic layers were washed with saturated sodium bicarbonate solution (2×), water, brine, dried over sodium sulfate, filtered, concentrated and purified by chromatography (12 g silica gel, 40% to 100% ethyl acetate-hexane) to afford (3R,4S)-4-(3,3′-dihydroxybiphenyl-4-yl)-3-[(3S)-3-(4-fluorophenyl)-3-hydroxypropyl]-1-phenylazetidin-2-one (53 mg, 69% yield)); 1H NMR (300 MHz, CDCl3) δ 7.30-7.13 (m, 7H), 7.08-6.85 (m, 8H), 6.78 (ddd, J=8.1, 2.3, 0.9 Hz, 1H), 5.04 (d, J=2.3 Hz, 1H), 4.61 (t, J=5.9 Hz, 1H), 3.07 (ddd, J=5.7, 1.8, 1.5 Hz, 1H), 2.08-1.80 (m, 4H) ppm; MS [M+H]+ 584.0 [M−H]− 582.0.

Provenance & Evidence