Potassium Carbonate → HCID 59643958, compound

Participants

Reaction Steps

4-{(2S,3R)-1-(4-Fluorophenyl)-3-[(3S)-3-(4-fluorophenyl)-3-hydroxypropyl]-4-oxoazetidin-2-yl}phenyl trifluoromethanesulfonate (162.5 mg, 0.30 mmol) and tetrakis(triphenylphosphine)palladium(0) (17.3 mg, 0.015 mmol) were dissolved in toluene (2.5 mL). 2.0 M aqueous potassium carbonate (0.3 mL) and a solution of 4-hydroxyphenylboronic acid (57.9 mg, 0.42 mmol) in ethanol (1.0 mL) were added. The reaction was stirred vigorously for 5 h at refluxing temperature under a nitrogen atmosphere and then diluted with water (2.5 mL), extracted with ethyl acetate (3×10 mL), washed with brine (10 mL), dried over sodium sulfate, filtered, concentrated and purified by chromatography (12 g silica gel, 10% to 100% ethyl acetate-hexane) to afford (3R,4S)-1-(4-fluorophenyl)-3-[(3S)-3-(4-fluorophenyl)-3-hydroxypropyl]-4-(4′-hydroxybiphenyl-4-yl)azetidin-2-one (112 mg, 77% yield) as a clear film; mp 110° C.; Rf 0.5 (1:1 ethyl acetate-hexane); 1H NMR (300 MHz, CDCl3) δ 7.5 (d, J=9.0 Hz, 2H) 7.4 (d, J=9.0 Hz, 2H) 7.3 (m, 6H), 6.9 (m, 6H), 4.7 (m, 1H), 4.6 (s, 1H), 3.15 (m, 1H), 2.1-1.9 (m, 4H) ppm; MS [M+H] 486.5.

Provenance & Evidence