Hydrochloric Acid → Methyl(1R,2R,5S,6S)-6-fluoro-2-hydroxy-4-oxobicyclo[3.1.0]hexane-6-carboxylate

Participants

Reaction Steps

TBS-ether 6′ (150 mg, 0.528 mmol) was treated with 1 M HCl (0.106 mL) in acetonitrile (0.8 mL) at rt for 2 h. The reaction was diluted with EtOAc, quenched by addition of a small amount of saturated aq. NaHCO3, washed with H2O and brine (twice), and dried over Na2SO4. The solvents were removed under reduced pressure, and the resulting residue was purified by flash silica gel column chromatography to afford hydroxy ketone 7′ as colorless solid: 1H NMR (CDCl3, 400 MHz) δ 4.60 (d, J=5.2 Hz, 1H), 3.72 (s, 3H), 2.67 (dd, J=5.2, 3.6 Hz, 1H), 2.42 (dd, J=5.2, 2.4 Hz, 1H), 2.34 (dd, J=18.9, 5.2 Hz, 1H), 2.22 (br-s, 1H), 2.08 (d, J=18.9 Hz, 1H), 1.93 (dd, J=3.6, 2.4 Hz, 1H); 13C NMR (CDCl3, 101 MHz) δ 208.8, 169.8, 68.3, 52.5, 42.7, 36.2, 34.2, 25.2.

Provenance & Evidence