Methyl 5-methoxy-4-(4-chlorobutoxy)-2-nitrobenzoate → HCID 10286203, 화합물

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 (6.29 mmol) of methyl 5-methoxy-4-(4-chlorobutoxy)-2-nitrobenzoate (purity: 99%) obtained in Reference Example III-10, 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 1.81 g (isolated yield: 98.1%, purity: 98% in terms of area percentage determined by high performance liquid chromatography) of methyl 5-methoxy-4-(4-chlorobutoxy)anthranilate as a white crystalline product.