2-chloro-5-methoxy-4-nitro-N-phenyl-benzamide → 4-amino-2-chloro-5-methoxy-N-phenyl-benzamide
反応式
[Cl:1][C:2]1[CH:16]=[C:15]([N+:17]([O-])=O)[C:14]([O:20][CH3:21])=[CH:13][C:3]=1[C:4]([NH:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1)=[O:5]>C(OCC)(=O)C.N1C=CC=CC=1.O>[NH2:17][C:15]1[C:14]([O:20][CH3:21])=[CH:13][C:3]([C:4]([NH:6][C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=2)=[O:5])=[C:2]([Cl:1])[CH:16]=1参加物
4
実験手順
Stannous chloride (334 mg, 1.76 mmol) was added to a solution of 2-chloro-5-methoxy-4-nitro-N-phenyl-benzamide (180 mg, 0.59 mmol) in a mixture of ethyl acetate and ethanol (1/1, 8 mL) and the reaction mixture was stirred at room temperature overnight. The resulting mixture was partitioned between ethyl acetate (50 mL) and an aqueous solution of potassium carbonate (5%, 30 mL); the organic layer was separated, washed with brine (30 mL), dried over anhydrous sodium sulfate, filtered and evaporate under reduced pressure. The crude residue was purified by flash chromatography (hexane/EtOAc, 70/30) to give 82 mf of 4-amino-2-chloro-5-methoxy-N-phenyl-benzamide as an off-white solid.