反应详情

A mixture of 5-hydroxypicolinic acid (5.00 g), N,O-dimethylhydroxylamine hydrochloride (3.86 g), TEA (11.1 mL), WSC (7.58 g) and HOBt (5.34 g) in DMF (100 mL) was stirred at room temperature for 24 h. The mixture was poured into 5% NaHCO3 aqueous solution and extracted with AcOEt (10 times). The organic layer was separated, dried over Na2SO4 and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (AcOEt/hexane) to give the title compound (4.13 g).

1. extractionextracted with AcOEt (10 times)
2. customThe organic layer was separated
3. dry with materialdried over Na2SO4
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by silica gel column chromatography (AcOEt/hexane)