反应详情

温度

114 °C

A solution of 2-[3,5-dichloro-4-(6-chloro-5-isopropyl-pyridazin-3-yloxy)-phenyl]-ethanol (17) (500 mg, 1.38 mmol) in glacial acetic acid (5 mL) was treated with sodium acetate (230 mg, 2.8 mmol) and heated to 114° C. for 24 h. At this time, the reaction mixture was cooled to room temperature and was concentrated under vacuum. The resulting residue was diluted with methylene chloride (25 mL) and was washed with water (10 mL). The organic layer was separated and was washed with a saturated aqueous sodium bicarbonate solution (10 mL). The waters layers were combined and extracted with methylene chloride (10 mL). The organic layers were combined and dried with sodium sulfate, filtered, concentrated and dried under high vacuum overnight to afford acetic acid 2-[3,5-dichloro-4-(5-isopropyl-6-oxo-1,6-dihydro-pyridazin-3-yloxy)-phenyl]-ethyl ester (34) (531 mg, 100%) as a white solid; LRMS for C17H18Cl2N2O4 (M+) m/z=385 Molecular Weight=385.2500; Exact Mass=384.0644

1. temperatureAt this time, the reaction mixture was cooled to room temperature
2. concentrationwas concentrated under vacuum
3. additionThe resulting residue was diluted with methylene chloride (25 mL)
4. washwas washed with water (10 mL)
5. customThe organic layer was separated
6. washwas washed with a saturated aqueous sodium bicarbonate solution (10 mL)
7. extractionextracted with methylene chloride (10 mL)
8. dry with materialdried with sodium sulfate
9. filtrationfiltered
10. concentrationconcentrated
11. customdried under high vacuum overnight