Ethyl 3-(3-chloro-2,4,5-trifluorophenyl)-3-oxopropanoate → Ethyl 8-chloro-1-(3,5-difluoro-6-methoxypyridin-2-yl)-6,7-difluoro-4-oxo-1,4-dihydroquinoline-3-carboxylate

Temperature

90 °C

To 3 ml chloroform solution of ethyl 3-ethoxy-2-(3-chloro-2,4,5-trifluorobenzoyl)acrylate prepared from 0.78 g of ethyl 3-chloro-2,4,5-trifluorobenzoylacetate by normal process was added 2-amino-3,5-difluoro-6-methoxypyridine until completion of the conversion into the aminoacrylate form was confirmed by monitoring the reaction by TLC. The solution was concentrated under reduced pressure, and to the residue were added 0.80 g of anhydrous potassium carbonate and 2 ml of N,N-dimethylformamide, and the mixture was stirred at 90° C. for 15 minutes and allowed to cool. The solution was separated by adding 30 ml of chloroform and 300 ml of distilled water, and the chloroform layer was washed twice with 300 ml of distilled water, dried over anhydrous magnesium sulfate, concentrated under reduced pressure, and allowed to stand. The precipitate was collected by filtration, washed with ethanol to obtain 615 mg of the title compound as a pale brown powder.

1. customthe reaction by TLC
2. concentrationThe solution was concentrated under reduced pressure
3. additionto the residue were added 0.80 g of anhydrous potassium carbonate and 2 ml of N,N-dimethylformamide
4. temperatureto cool
5. customThe solution was separated
6. additionby adding 30 ml of chloroform and 300 ml of distilled water
7. washthe chloroform layer was washed twice with 300 ml of distilled water
8. dry with materialdried over anhydrous magnesium sulfate
9. concentrationconcentrated under reduced pressure
10. filtrationThe precipitate was collected by filtration
11. washwashed with ethanol

ORD record

ord-73e323aaf2944eb4acf5f3082ed6fabc

Source dataset

uspto-grants-1999_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05998436