反应详情

To a solution of ethane-1,2-diol (301 mg, 270 μA, 4.84 mmol) in dried DMF (6 mL) was added sodium hydride (232 mg, 4.84 mmol) and the reaction mixture was stirred at room temperature for 15 minutes. The resulting solution was added slowly to a solution of 6-chloro-5-(4-chlorophenyl)-3-pyridinecarboxylic acid (CAN 1012792-56-1; 0.590 g, 2.2 mmol) in dried DMF (6 mL) and stirred at 80° C. for 4 h. More sodium hydride (106 mg, 2.2 mmol) was added and at room temperature and stirring at 80° C. commenced for another 2 h. Water was added and DMF was evaporated. The residue was dissolved in water; acidified with 3M HCl to pH 3. The suspension was filtered; the filter cake was washed with water and dried under high vacuo. The crude material was purified by flash chromatography (ReproFlash Acidosil-S, 50 g, 50% to 100% ethylacetate in heptane) to give 0.27 g (41%) of the title compound as a white solid; MS (ESI): 292.1 (M−H)−.

1. stirringstirred at 80° C. for 4 h
2. stirringstirring at 80° C.
3. waitcommenced for another 2 h
4. customDMF was evaporated
5. dissolutionThe residue was dissolved in water
6. filtrationThe suspension was filtered
7. washthe filter cake was washed with water
8. customdried under high vacuo
9. customThe crude material was purified by flash chromatography (ReproFlash Acidosil-S, 50 g, 50% to 100% ethylacetate in heptane)