Dichloromethane → 3-[1-(4-Acetylamino-benzyl)-2-oxo-1,2,5,6-tetrahydro-pyridin-3-yl)-propionic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

17.5 mg of 3-[1-(4-amino-benzyl)-2-oxo-1,2,5,6-tetrahydro-pyridin-3-yl]-propionic acid methyl ester (h) prepared by above Step 1 was dissolved in methylene chloride solution (0.06 mmol). And then 6 μl of (AcO)2O (0.07 mmol), 0.01 ml of triethylamine (0.08 mmol) and 1.0 mg of DMAP (0.008 mmol) were added thereto and the mixture was stirred for 3 hrs at 0° C. The reaction was stopped by adding methanol and the mixture was extracted three times with 10 ml of ethyl acetate. The organic layer was washed with saturated NaCl solution, dried over anhydrous MgSO4, filtered and concentrated in vacuo. The resulting compound was purified with Silica gel column chromatography with ethylacetate as an eluant to give 46 mg of 3-[1-(4-acetylamino-benzyl)-2-oxo-1,2,5,6-tetrahydro-pyridin-3-yl)-propionic acid methyl ester (i) (yield: 44%).

Provenance & Evidence