反应详情

5-(2-Pyridyl)valeric acid (1.5 g, 8.4 mmol) was dissolved in N,N-dimethylformamide (25 ml), and trimethylsilylethanol (2.0 g, 16.7 mmol), WSC (3.2 g, 16.7 mmol) and HOBt (2.3 g, 16.7 mmol) were added thereto successively. The mixture was stirred at room temperature for 6 hrs. The solvent was evaporated, and the residue was combined with ethyl acetate and water. The organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate. The solvent was evaporated, and the residue was subjected to a silica gel (60 g) column chromatography. The fractions eluted with hexane-ethyl acetate (2:1, v/v) were collected and concentrated to give the titled compound (1.1 g, 49%).

1. customThe solvent was evaporated
2. washThe organic layer was washed with saturated brine
3. dry with materialdried over anhydrous magnesium sulfate
4. customThe solvent was evaporated
5. washThe fractions eluted with hexane-ethyl acetate (2:1
6. customv/v) were collected
7. concentrationconcentrated