Citric Acid → (S)-Tert-butyl 3-mercaptopyrrolidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of (S)-tert-butyl 3-(acetylthio)pyrrolidine-1-carboxylate (STEP B, 1.82 g, 7.42 mmol) in methanol (15 mL) was added potassium carbonate (2.05 g, 14.8 mmol). The mixture was stirred at 50° C. for 2 h. Then the mixture was cooled to room temperature, acidified by addition of 20% citric acid aqueous solution and concentrated in vacuo to remove methanol. The residue was diluted with ethyl acetate to separate. The organic layer was dried over sodium sulfate and concentrated in vacuo. The crude product was used for the next step without purification.

Provenance & Evidence