反应详情

温度

40 °C

A mixture of 6-chloro-2-methylpyrimidin-4-amine (500 mg, 3483 μmol), pyridine (568 μl, 6965 μmol), and acetic anhydride (493 μl, 5224 μmol) was stirred at 40° C. for 24 h. The mixture was cooled down to rt. The reaction mixture was diluted with saturated NaHCO3 (30 mL) and extracted with EtOAc (2×40 mL). The organic extract was washed with saturated NaCl (about2 mL), dried over Na2SO4, filtered, concentrated in vacuo and the residue was purified by silica gel chromatography eluting with 40% EtOAc/hexanes to give N-(6-chloro-2-methylpyrimidin-4-yl)acetamide (458 mg, 71% yield). 1H NMR (300 MHz, CDCl3) δ 8.03 (s, 1H); 7.90 (s, 1H); 2.58 (s, 3H); 2.23 (s, 3H). m/z (ESI, +ve ion) 186 (M+H)+.

1. temperatureThe mixture was cooled down to rt
2. extractionextracted with EtOAc (2×40 mL)
3. extractionThe organic extract
4. washwas washed with saturated NaCl (about2 mL)
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customthe residue was purified by silica gel chromatography
9. washeluting with 40% EtOAc/hexanes