Hydrochloric Acid → 3-[2-(2-Oxo-1,2-dihydroindol-3-ylidenemethyl)-phenyl]-propionic acid

Participants

Reaction Conditions

Reaction Steps

To 300 mg of ethyl (E)-3-[(2-oxo-1,2-dihydroindol-3-ylidenemethyl)phenyl]-propionate in 3 mL of ethanol was added 2 mL of 2N sodium hydroxide. The mixture was stirred at 90° C. for 2 hrs, cooled and acidified with 6 N hydrochloric acid to pH 3. The solid was collected by filtration and washed with cold ethanol to give 30 mg of 3-[2-(2-oxo-1,2-dihydroindol-3-ylidenemethyl)-phenyl]-propionic acid as a yellow solid.

Provenance & Evidence