Reacción #1962

Ecuación de reacción

4-Chloro-5-fluoro-alpha-bromo-2-picoline

Methylamine

→

title compound

Rendimiento 70.0%

4-Chloro-5-fluoro-2-(N-methylaminomethyl)-pyridine

Rendimiento 70.0%

Disolventes

methanol

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrothe tube was sealed
2. 2
   Otrothe solvent was removed under reduced pressure
3. 3
   workup.ADDITIONTo the residue was added 50 mL of 10% aqueous sodium carbonate solution
4. 4
   Extracciónthe resultant aqueous mixture was extracted with 3 X 50 mL of methylene chloride
5. 5
   ExtracciónThe organic combined extract
6. 6
   Secadowas dried over anhydrous sodium sulfate
7. 7
   Filtraciónfiltered
8. 8
   Concentraciónconcentrated under reduced pressur
9. 9
   OtroThe residue was dried in vacuo

Procedimiento

4-Chloro-5-fluoro-alpha-bromo-2-picoline (1.37 g, 6.1 mmol), from Step 1 was dissolved in 15 mL of methanol in a pressure tube. Methylamine (3 mL of 40% aqueous solution) was added to the tube and the tube was sealed. The reaction mixture was stirred at ambient temperature for 26 hours and then the solvent was removed under reduced pressure. To the residue was added 50 mL of 10% aqueous sodium carbonate solution and the resultant aqueous mixture was extracted with 3 X 50 mL of methylene chloride. The organic combined extract was dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressur. The residue was dried in vacuo to give 754 mg g (70% yield) of the title compound; MS DCI-NH3M/Z: 175 (M+H)+ base; 1H NMR (CDCl3) d 2.50 (s, 3H), 3.90 (s, 2H), 7.47 (d, 1H), 8.42 (s, 1H).

Fuente