[CH3:1][O:2][C:3]1[C:12]([O:13][CH2:14][CH2:15][CH2:16][Cl:17])=[CH:11][C:6]([C:7]([O:9][CH3:10])=[O:8])=[C:5]([N+:18]([O-])=O)[CH:4]=1.[H][H]>[Pd].CO>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([NH2:18])[C:6](=[CH:11][C:12]=1[O:13][CH2:14][CH2:15][CH2:16][Cl:17])[C:7]([O:9][CH3:10])=[O:8]In a 50 mL volume glass flask equipped with a stirrer, a thermometer, a reflux condenser and a gas inlet were placed 2.02 g (6.58 mmol) of methyl 4-methoxy-5-(3-chloropropoxy)-2-nitrobenzoate (purity: 99%) obtained in Reference Example III-12, and 40 mL of methanol. The resulting mixture was heated to 40° C. under stirring. To the mixture was added 0.2 g of 5 wt. % palladium/carbon (containing 49% water) at the same temperature. The resulting mixture was heated to the same temperature for 2 hours, while hydrogen was introduced into the mixture under atmospheric pressure at a rate of 50 mL/min. After the reaction was complete, the reaction mixture was filtered and the filtrate was concentrated under reduced pressure, to precipitate a crystalline product. The crystalline product was dried under reduced pressure, to give 1.80 g (isolated yield: 98.1%, purity: 98% in terms of area percentage determined by high performance liquid chromatography) of methyl 4-methoxy-5-(3-chloropropoxy)anthranilate as a white crystalline product.
読み込み中…
