Reacción #57807

Ecuación de reacción

4-Bromo-benzenesulfonyl chloride

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

→

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

Disolventes

pyridine

Condiciones de reacción

Tratamiento posterior

1. 1
   Otropyridine was then evaporated under vacuum
2. 2
   workup.DISSOLUTIONThe resulting crude material was dissolved in dichloromethane
3. 3
   Extracciónextracted with saturated bicarbonate solution
4. 4
   LavadoThe combined organic layer was washed with brine
5. 5
   Secadodried over magnesium sulfate
6. 6
   Filtraciónfiltered
7. 7
   Concentraciónconcentrated
8. 8
   workup.ADDITIONethyl acetate (50 mL) added to the solid
9. 9
   Filtraciónthe solid was filtered
10. 10
    Lavadowashed again with ethyl acetate
11. 11
    Otroto yield a pale yellow solid

Procedimiento

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

Fuente