Acetic Acid → HCID 22561690, compound

Participants

Reaction Steps

To the suspension of 2-[3-(1H-indol-4-yl)phenoxy)-ethanol (5.4 g, 21 mmol) in t-BuOH: ethanol: acetic acid (139.5 mL: 84 mL: 100.5 mL) was added pyridinium tribromide (21.21 g, 63 mmol) portionwise. The mixture was stirred at room temperature for 3 hours, and then to the mixture was added more acetic acid (90 mL) and water (3 mL). Zinc dust (21 g) was added to the reaction mixture portionwise. After stirring for one hour, the unreacted zinc was filtered off and most of the solvent was removed under reduced pressure. The residue was diluted with ethyl acetate, washed with 1N HCl (3×), water (1×), brine (2×), dried over Na2SO4, concentrated. The residue was recrystallized to give 1.82 g (32%) of 4-[3-(2-hydroxy-ethoxy)phenyl]-1,3-dihydro-indol-2-one.

Provenance & Evidence