反应详情

To a stirred solution of 4-iodo-5-chloro-2-methoxy benzoic acid (3.12 g, 10 mmol) of Example 20, Step A in N,N-dimethylformamide (100 mL) was added 2-chlorophenyl boronic acid (5.07 g, 32.4 mmol) and potassium carbonate (12.73 g, 92 mmol). This mixture was purged with nitrogen and then treated with tetrakis(triphenylphosphine) palladium(0) (0.58 g, 0.5 mmol). The reaction was heated to reflux overnight, cooled, acidified with 2 N hydrochloric acid and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate, filtered, and evaporated to provide a nearly quantitative amount of the title acid which was used in the next step without further purification.

1. customThis mixture was purged with nitrogen
2. temperatureThe reaction was heated
3. temperatureto reflux overnight
4. temperaturecooled
5. extractionextracted with ethyl acetate
6. washThe organic layer was washed with brine
7. dry with materialdried over anhydrous magnesium sulfate
8. filtrationfiltered
9. customevaporated