Реакция #67615

Уравнение реакции

dimethylamine

3-Methyl-4-nitrobenzoic acid

carbonyl diimidazole

→

N,N,3-trimethyl-4-nitrobenzamide

Выход 75.4%

Растворители

DMF

Условия реакции

Обработка

1. 1
   workup.ADDITIONwas added
2. 2
   workup.ADDITIONThe mixture was poured onto ice water (200 ml)
3. 3
   Экстракцияextracted with EtOAc (×6)
4. 4
   ПромывкаThe combined extracts were washed with brine
5. 5
   Сушкаdried over MgSO4
6. 6
   Фильтрацияfiltered
7. 7
   Другоеevaporated
8. 8
   ФильтрацияTritration with ether followed by filtration

Методика

3-Methyl-4-nitrobenzoic acid (3.0 g, 16.56 mmol) in DMF (30 mL) was stirred with carbonyl diimidazole (3.22 g, 1.2 Eq.) for 90 mins. The reaction mixture was cooled in an icebath, and dimethylamine (2 M in THF, 25 mL, 3 Eq.) was added. The mixture was then allowed to warm to room temperature and stirred for 2 hours. The mixture was poured onto ice water (200 ml) and extracted with EtOAc (×6). The combined extracts were washed with brine, dried over MgSO4, filtered and evaporated. Tritration with ether followed by filtration gave N,N,3-trimethyl-4-nitrobenzamide (2.6 g, colourless solid); MS (ES+) 209.

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