反应详情

t-BuOK (92 mg, 823 μmol) and methanesulfonic acid 3-pyridin-4-yl-[1,2,4]oxadiazol-5-ylmethyl ester (Preparation 12, 150 mg, 588 μmol) were added to a stirred solution of 4-mercaptopiperidine-1-carboxylic acid tert-butyl ester (191 mg, 881 mol) in anhydrous THF (10 ml). After 100 min, the reaction mixture was diluted with Et2O, before being washed with NaHCO3 and brine. The organic layer was dried (MgSO4), filtered, and concentrated, then the residue was purified by column chromatography (IH-EtOAc, 3:2) to afford the title compound: RT=3.77 min; m/z (ES+)=377.2 [M+H]+.

1. washbefore being washed with NaHCO3 and brine
2. dry with materialThe organic layer was dried (MgSO4)
3. filtrationfiltered
4. concentrationconcentrated
5. customthe residue was purified by column chromatography (IH-EtOAc, 3:2)