反应详情

A solution of tert-butyl (2R)-2-((3S)-3-{[(6-chloro-2-naphthyl)sulfonyl]amino}-2-oxopyrrolidin-1-yl)propanoate (0.025 g) in DCM (1 ml) was treated with trifluoroacetic acid (1 ml) and stirred at room temperature for 2 h. The mixture was then concentrated under reduced pressure to give an oil which was subsequently treated with 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (0.013 g), HOBT (0.009 g) and triethylamine (0.023 ml). After stirring at room temperature for 1 h, N-piperidin-3-ylbenzamide (0.015 g) was added and stirring was continued for 48 h. The reaction mixture was partitioned between DCM and water. The organic extract was concentrated under reduced pressure and the residue purified using SPE (silica, eluting with cyclohexane:ethyl acetate 5:1, 3:1, 1:1, 1:3 and ethyl acetate) to give the title compound (0.012 g) as a colourless gum.

1. concentrationThe mixture was then concentrated under reduced pressure
2. customto give an oil which
3. stirringAfter stirring at room temperature for 1 h
4. stirringstirring
5. waitwas continued for 48 h
6. customThe reaction mixture was partitioned between DCM and water
7. extractionThe organic extract
8. concentrationwas concentrated under reduced pressure
9. customthe residue purified
10. washSPE (silica, eluting with cyclohexane:ethyl acetate 5:1, 3:1, 1:1, 1:3 and ethyl acetate)