反应详情

温度

40 °C

In a 50 mL volume glass flask equipped with a stirrer, a thermometer and a dropping funnel were placed 16.2 g (65.4 mmol) of 4-(3-chloropropoxy)-3-methoxybenzoic acid (purity: 98%) obtained in Reference Example III-7, 0.45 g (6.54 mmol) of sodium nitrite, and 20 mL of acetic acid. The resulting mixture was heated to 40° C. under stirring. To the reaction mixture was dropwise added slowly 27.6 g (262.0 mmol) of nitric acid (60 wt. %), and the mixture was heated at the same temperature for 5 hours. After the reaction was complete, 20 mL of water was added to the reaction mixture, and the aqueous mixture was cooled to 20° C., precipitating a crystalline product. The crystalline product was collected by filtration, washed with 30 mL of water, and dried under reduced pressure, to give 17.9 g (isolated yield: 93.0%, purity: 99% in terms of area percentage determined by high performance liquid chromatography) of 5-methoxy-4-(3-chloropropoxy)-2-nitrobenzoic acid as a white crystalline product.

1. customIn a 50 mL volume glass flask equipped with a stirrer
2. temperaturethe mixture was heated at the same temperature for 5 hours
3. temperaturethe aqueous mixture was cooled to 20° C.
4. customprecipitating a crystalline product
5. filtrationThe crystalline product was collected by filtration
6. washwashed with 30 mL of water
7. customdried under reduced pressure