反应详情

To a suspension of N-(4-chloro-3-hydroxymethyl-phenyl)-2-methyl-6-trifluoromethyl-nicotinamide (3.29 g; 9.56 mmol) in dichloromethane (300 ml) was added manganese dioxide (8.31 g; 95.6 mmol) and the resulting mixture stirred at room temperature for 30 minutes. Analysis after this time showed a 60% conversion to product. Further manganese dioxide (8 g; 92 mmol) was added in three portions over the next 90 minutes. The reaction mixture was then filtered through celite and the filtrate evaporated to give N-(4-chloro-3-formyl-phenyl)-2-methyl-6-trifluoromethyl-nicotinamide (3.2 g, 97%).

1. filtrationThe reaction mixture was then filtered through celite
2. customthe filtrate evaporated