Hydrochloric Acid → HCID 67253982, compound

Participants

Reaction Steps

To a mixture of 2-(4-fluoro-1,6-dihydroxy-1,3-dihydrobenzo[c][1,2]oxaborol-3-yl)-acetic acid (113 mg, 0.5 mmol) and sodium hydroxide (0.06 g, 1.5 mmol) in water (3 mL) was added ethyl chloroformate (59 mg, 0.55 mmol). The reaction mixture was stirred at room temperature for 15 min and then acidified to pH=2 with 1N HCl. The mixture was extracted with ethyl acetate (2×15 mL) and the combined organic layers were dried over anhydrous Na2SO4 and concentrated in vacuo. The residue was purified by HPLC to give the title compound as a white solid (21 mg, Yield: 14%). 1H NMR (400 MHz, DMSO-d) δ9.57 (s, 1H), 7.32-7.37 (m, 2H), 5.59-5.62 (m, 1H), 4.25-4.30 (m, 2H), 2.95-3.00 (m, 1H), 2.36-2.42 (m, 1H), 1.29-1.32 (t, J=6.8 Hz, 3H). MS (ESI) m/z=299 [M+H]+.

Provenance & Evidence