HCID 12813362, compound → HCID 12813363, compound

Participants

Reaction Steps

1-(2-Benzoylthiopropanoyl)-L-proline (5.7 g.) is dissolved in a mixture of water (12 ml.) and concentrated ammonium hydroxide (9 ml.) with stirring. After one hour, the mixture is diluted with water (10 ml.) and filtered. The filtrate is extracted twice with ethyl acetate, concentrated to one-third of the original volume, acidified with concentrated hydrochloric acid and extracted with ethyl acetate. The organic phase is washed with saturated sodium chloride, dried and concentrated to dryness in vacuo. The residue, 1-(2-mercaptopropanoyl)-L-proline, is crystallized from ethyl acetate-hexane, yield 3 g., m.p. (105) 116°-120°.

Provenance & Evidence