Реакция #1962

Уравнение реакции

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

Methylamine

→

title compound

Выход 70.0%

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

Выход 70.0%

Растворители

methanol

Условия реакции

Обработка

1. 1
   Другоеthe tube was sealed
2. 2
   Другоеthe solvent was removed under reduced pressure
3. 3
   workup.ADDITIONTo the residue was added 50 mL of 10% aqueous sodium carbonate solution
4. 4
   Экстракцияthe resultant aqueous mixture was extracted with 3 X 50 mL of methylene chloride
5. 5
   ЭкстракцияThe organic combined extract
6. 6
   Сушкаwas dried over anhydrous sodium sulfate
7. 7
   Фильтрацияfiltered
8. 8
   Концентрированиеconcentrated under reduced pressur
9. 9
   ДругоеThe residue was dried in vacuo

Методика

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).

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