反应详情

To a solution of 4-chloro-2-fluoroaniline (1.15 g, 7.9 mmol) in 125 mL of ethanol added silver sulphate (1.7 g, 8.3 mmol), then followed by addition of I2 (2.1 g, 8.3 mmol) in portions. After the addition was completed, the mixture was stirred at RT for 2 hours. The mixture was filtered through celite and the filtration was evaporated to give dark oil which was dissolved in 125 mL of DCM. The solution was washed with 2 M sodium hydroxide (40 mL×2), saturated Na2S2O3 (40 mL×2) and water (40 mL×2). The resulting solution was dried over MgSO4 and then evaporated to give the crude 4-chloro-2-fluoro-6-iodoaniline as dark oil (2.1 g, yield: 98%).

1. additionAfter the addition
2. filtrationThe mixture was filtered through celite
3. filtrationthe filtration
4. customwas evaporated
5. customto give dark oil which
6. washThe solution was washed with 2 M sodium hydroxide (40 mL×2), saturated Na2S2O3 (40 mL×2) and water (40 mL×2)
7. dry with materialThe resulting solution was dried over MgSO4
8. customevaporated