反应详情

温度

25 °C

A solution of 2-bromo-4-chlorobenzoic acid (25.0 g, 106.0 mmol) in 2-ethoxy ethanol (40 mL) was treated with copper powder (0.74 g, 11.6 mmol), copper (I) oxide (0.76 g, 5.3 mmol) and potassium carbonate (15.8 g, 114.0 mmol) at 25° C. under nitrogen. The reaction was stirred at 25° C. for 5 min. At this time, the reaction was treated with aniline (11.2 mL, 124 mmol) and then was heated 135° C. for 48 h. At this time, the reaction was cooled to 25° C., diluted with water (30 mL) and was acidified with a 1N aqueous hydrochloric acid solution. The resulting mixture was stirred at 25° C. overnight. At this time, the resulting precipitate was collected by filtration through a sintered glass funnel. The solids were washed with an excess amount of water (2×100 mL) and then were dried under high vacuum to afford 4-chloro-2-phenylamino-benzoic acid (19 g, 72.3%) as a brown solid. This material was used without further purification.

1. temperaturewas heated 135° C. for 48 h
2. temperatureAt this time, the reaction was cooled to 25° C.
3. stirringThe resulting mixture was stirred at 25° C. overnight
4. filtrationAt this time, the resulting precipitate was collected by filtration through a sintered glass funnel
5. washThe solids were washed with an excess amount of water (2×100 mL)
6. customwere dried under high vacuum