Sodium Hydroxide → HCID 12897027, compound

Participants

Reaction Steps

Methyl 5-(2-methylphenylthio)pyrrole-3-carboxylate (1.1 g.) was combined with 20 ml. of 1 N sodium hydroxide and 50 ml. of methanol and refluxed for 2.5 hours, at which time thin layer chromatography with hexane-5/ethyl acetate-1/5% acetic acid as eluant indicated reaction to be complete. Methanol was removed by evaporation, the aqueous residue was diluted with approximately one volume of water, and extracted with ether. The aqueous phase was acidified with 6 N hydrochloric acid and the product extracted into ethyl acetate. The ethyl acetate was washed with saturated brine, dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo to crude product (1.0 g.). Recrystallization from methylene chloride/hexane gave purified 5-(2-methylphenylthio)pyrrole-3-carboxlic acid (590 mg., m.p. 151°-153° C., m/e 233).

Provenance & Evidence