反应详情

To a solution of 3,5-dichloro-2-fluoro-4-(3-isopropyl-4-methoxyphenoxy)-6-methoxycarbonylmethoxy-pyridine (120 mg) in CH2Cl2 (3.0 mL) was added a solution of BBr3 in CH2Cl2 (1 mL, 1.0 M) at ambient temperature. The resulting mixture was stirred for 2 h, poured to stirring water (50 mL), extracted with CH2Cl2 (20 mL×3) from water, dried (Na2SO4) and concentrated to dryness under reduced pressure. The residue was dissolved in THF:MeOH:H2O=3:1:1 (5 mL), treated with a solution of LiOH in water (1 mL, 1.0 M) and stirred at ambient temperature for 30 min. The reaction mixture was diluted with a 1.0 M solution of HCl (50 mL), extracted with ethyl acetate(50 mL×3), dried (Na2SO4) and concentrated under reduced pressure. Purification by HPLC afforded the title compound as a colorless oil (80 mg).

1. additionpoured
2. extractionextracted with CH2Cl2 (20 mL×3) from water
3. dry with materialdried (Na2SO4)
4. concentrationconcentrated to dryness under reduced pressure
5. dissolutionThe residue was dissolved in THF
6. additionMeOH:H2O=3:1:1 (5 mL), treated with a solution of LiOH in water (1 mL, 1.0 M)
7. stirringstirred at ambient temperature for 30 min
8. additionThe reaction mixture was diluted with a 1.0 M solution of HCl (50 mL)
9. extractionextracted with ethyl acetate(50 mL×3)
10. dry with materialdried (Na2SO4)
11. concentrationconcentrated under reduced pressure
12. customPurification by HPLC