Methanol → HCID 16039297, compound

Participants

Reaction Steps

A solution of dimethyl(4′-{(2S,3R)-3-[(3S)-3-{[tert-butyl(dimethyl)silyl]oxy}-3-(4-fluorophenyl)propyl]-4-oxo-1-phenylazetidin-2-yl}-3′-hydroxybiphenyl-3-yl)phosphonate (0.041 g, 0.059 mmol) in dry dichloromethane (5 mL) under nitrogen was cooled in ice and bromotrimethylsilane (0.030 mL, 0.30 mmol) was dripped in over 5 min. The reaction mixture was stirred at room temperature for 3 h, then methanol (1 mL) was added and the reaction was partitioned between water and ethyl acetate. The organic solution was washed successively with water (2×) and brine. The organic solution was dried over sodium sulfate, filtered and the solvent was removed by rotary evaporation under reduced pressure. The residue was purified by reverse-phase HPLC (Polaris C18-A 10 μ 250×21.2 mm column, 30% to 59% acetonitrile-0.1% trifluoroacetic acid in water) to afford (4′-{(2S,3R)-3-[(3S)-3-(4-fluorophenyl)-3-hydroxypropyl]-4-oxo-1-phenylazetidin-2-yl}-3′-hydroxybiphenyl-3-yl)phosphonic acid as a white powder (0.014 g, 44%); 1H NMR (300 MHz, CD3OD) δ 8.0 (d, J=13.6 Hz, 1H), 6.9-7.8 (m, 15H), 5.17 (d, J=2.1 Hz, 1H), 4.63 (d, J=5.2 Hz, 1H), 3.15-3.25 (m, 1H), 1.8-2.1 (m, 4H) ppm; MS [M−H]+ 546, [2M−H]+ 1093.

Provenance & Evidence