反应详情

To a suspension of sodium 4-({(4-methylisoquinolin-3-yl)[4-(trifluoromethoxy)-benzyl]amino}sulfonyl)benzoate (107.7 mg, 0.200 mmol) prepared in Example 2 in chloroform (1 mL) was added oxalyl dichloride (21 μL, 0.240 mmol), and the mixture was stirred at room temperature for 2 hours. Then, thereto was added additional oxalyl dichloride (21 μL, 0.24 mmol), and the mixture was stirred at room temperature for 1 hour. The reaction solution was concentrated under reduced pressure. Then, the resulting residue was suspended in chloroform (1 mL), and added dropwise to a suspension of O-methylhydroxylamine hydrochloride (50.1 mg, 0.600 mmol) and triethylamine (139 μL, 1.00 mmol) in chloroform (1 mL), and the mixture was stirred at room temperature for 1 hour. The resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=3:1→0:10) to give N-methoxy-4-({(4-methylisoquinolin-3-yl)[4-(trifluoromethoxy)benzyl]amino}sulfonyl)-benzamide (88.1 mg, 81%) as a white powder.

1. stirringthe mixture was stirred at room temperature for 1 hour
2. concentrationThe reaction solution was concentrated under reduced pressure
3. stirringthe mixture was stirred at room temperature for 1 hour
4. customThe resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=3:1→0:10)