反应详情

To a solution of 3-(3-fluorophenyl)-5-methoxy-benzoic acid (524 mg, 2.1 mmol, 1.0 eq) in CH2Cl2 (10 mL) was added dropwise (COCl)2 (810 mg, 6.4 mmol, 3 eq) at 0° C. DMF (0.1 mL) was added and the reaction mixture stirred at room temperature for 3 h. The solvent was removed under reduced pressure and the residue obtained was dissolved in THF (20 mL) and added dropwise to a mixture of 3-amino-4-fluoro-2-methyl-phenol (300 mg, 2.1 mmol, 1 eq) and K2CO3 (1.47 g, 10.6 mmol, 5 eq.) in THF (20 mL) at 0° C. After the addition, the reaction mixture was stirred at room temperature for 3 h. The resulting mixture was poured into water and extracted with EtOAc. The organic extract was washed with brine, dried (Na2SO4), filtered and evaporated in vacuo. The residue obtained was purified by column chromatography (petroleum ether:EtOAc, 20:1) to give the title compound as yellow solid (500 mg, 63%).

1. customThe solvent was removed under reduced pressure
2. customthe residue obtained
3. additionAfter the addition
4. stirringthe reaction mixture was stirred at room temperature for 3 h
5. extractionextracted with EtOAc
6. extractionThe organic extract
7. washwas washed with brine
8. dry with materialdried (Na2SO4)
9. filtrationfiltered
10. customevaporated in vacuo
11. customThe residue obtained
12. customwas purified by column chromatography (petroleum ether:EtOAc, 20:1)