Benzoyl chloride → HCID 59289350, compound

Participants

Reaction Steps

Compound 22.2 (4.20 g, 13.66 mmol) in pyrdine (40 mL, 0.33 M) was cooled to 0° C. and treated with benzoyl chloride (12.68 mL, 109.3 mmol) The mixture was warmed to room temperature and stirred for 16 h. The solvent was removed in vacuo and the residue was treated with 2.5 N KOH (40 mL) in pyridine (40 mL) and stirred for 20 min. The mixture was cooled to 0° C. and AcOH was added (6 mL). The solvent was removed in vacuo and the residue was dissolved in EtOAc (150 mL) and washed with H2O (100 mL), saturated NaHCO3 (2×100 mL), and brine (100 mL). The organic layer was dried over Na2SO4, filtered, and concentrated under reduced pressure to afford compound 22.3 (2.74 g, 49% yield) as a white solid: 1H NMR (CDCl3, 300 MHz) 9.02 (br s, 1H), 8.80 (s, 1H), 8.55 (s, 1H), 7.97 (d, J=7.5 Hz, 2H), 7.62 (app t, J=7.5 Hz, 1H), 7.52 (t, J=7.5 Hz, 2H), 6.65 (s, 1H), 5.25 (m, 1H), 5.07 (d, J=6.0 Hz, 1H), 4.99 (br s, 1H), 4.53 (m, 1H), 3.91 (m, 1H), 3.77 (m, 1H), 1.61 (s, 3H), 1.35 (s, 3H); MS (ESI) m/z 412 [M+H]+.

Provenance & Evidence