反应详情

温度

50 °C

To a mixture of 1-t-butoxycarbonyl-2-methylindole-4-acetic acid (96.3 g) in methanol (200 ml)—water (100 ml) was added dropwise 5N aqueous solution of sodium hydroxide (200 ml) at room temperature, and the mixture was stirred at 50° C. for 3 hours and then stirred at room temperature for 12 hours. The reaction mixture was extracted with hexane—ether. The aqueous layer was adjusted to acidic condition with hydrochloric acid and then extracted with ethyl acetate. The extraction was washed with water and a saturated aqueous solution of sodium chloride, successively, dried and concentrated under reduced pressure to give the title compound (53.9 g; crude).

1. stirringstirred at room temperature for 12 hours
2. extractionThe reaction mixture was extracted with hexane—ether
3. extractionextracted with ethyl acetate
4. extractionThe extraction
5. washwas washed with water
6. dry with materiala saturated aqueous solution of sodium chloride, successively, dried
7. concentrationconcentrated under reduced pressure