反应详情

Stir sodium hydride (13 g) in a mixture of dimethylsulfoxide (100 ml) and benzene (100 ml), and heat at 65°-75° for 2 hours under nitrogen. To this mixture add ethyl 6-bromo-5-chloro-3-phenylindole-2-carboxylate in dimethylsulfoxide (50 ml) and benzene (30 ml) at 15°-20° and stir the mixture at room temperature for one hour. Cool the resulting mixture to 15° C. add 50 ml of water (very slowly) and then add an additional 550 ml of water. Add 25 ml of acetic acid, stir and then filter. Wash the resulting solid with water and then hexane. Crystallize the desired product from methanol-methylene chloride to obtain 6-bromo-5-chloro-2[(methylsulfinyl)acetyl]-3-phenylindole, m.p. 169°-170°.

1. temperatureheat at 65°-75° for 2 hours under nitrogen
2. temperatureCool the resulting mixture to 15° C.
3. stirringstir
4. filtrationfilter
5. washWash the resulting solid with water
6. customCrystallize the desired product from methanol-methylene chloride