反应详情

To a stirred solution of [4-(cyclopropylcarbamoyl)-3-methylphenyl]boronic acid (13.95 g, 63.68 mmol) in DCM (160 mL) at rt was added under a nitrogen atmosphere 6-bromo-1H-benzimidazol-4-amine (6.75 g, 31.84 mmol), copper(II)acetate (11.57 g, 63.68 mmol), pyridine N-oxide (3.33 g, 35.02 mmol) and pyridine (7.55 g, 95.53 mmol). After stirring overnight at rt, the mixture was stirred at 40° C. for 3 days. Filtration through ALLOX, extraction with water and evaporation of the organic phase gave the crude product, which was purified by flash chromatography to yield 6 g 4-(4-amino-6-bromo-1H-benzimidazol-1-yl)-N-cyclopropyl-2-methylbenzamide (50%).

1. stirringthe mixture was stirred at 40° C. for 3 days
2. filtrationFiltration
3. extractionthrough ALLOX, extraction
4. customwith water and evaporation of the organic phase
5. customgave the crude product, which
6. customwas purified by flash chromatography