Réaction #57807

Équation de réaction

4-Bromo-benzenesulfonyl chloride

(2-amino-5-chloro-phenyl)-pyridin-4-yl-methanone

→

4-Bromo-N-[4-chloro-2-(pyridine-4-carbonyl)-phenyl]-benzenesulfonamide

Solvants

pyridine

Conditions de réaction

Traitement

1. 1
   Autrepyridine was then evaporated under vacuum
2. 2
   workup.DISSOLUTIONThe resulting crude material was dissolved in dichloromethane
3. 3
   Extractionextracted with saturated bicarbonate solution
4. 4
   LavageThe combined organic layer was washed with brine
5. 5
   Séchagedried over magnesium sulfate
6. 6
   Filtrationfiltered
7. 7
   Concentrationconcentrated
8. 8
   workup.ADDITIONethyl acetate (50 mL) added to the solid
9. 9
   Filtrationthe solid was filtered
10. 10
    Lavagewashed again with ethyl acetate
11. 11
    Autreto yield a pale yellow solid

Mode opératoire

4-Bromo-benzenesulfonyl chloride 27.5 g (107 mmol) was dissolved in 180 ml of anhydrous pyridine. To this solution was added (2-amino-5-chloro-phenyl)-pyridin-4-yl-methanone 25 g (107 mmol). The reaction mixture was stirred under nitrogen 5 hour at 80° C. and pyridine was then evaporated under vacuum. The resulting crude material was dissolved in dichloromethane, and extracted with saturated bicarbonate solution. The combined organic layer was washed with brine dried over magnesium sulfate, filtered and concentrated, then ethyl acetate (50 mL) added to the solid, the solid was filtered, washed again with ethyl acetate, to yield a pale yellow solid: LC-MSD, m/z for C18H12BrClN2O3S [M+H]+: 452.9

Source