反应详情

温度

80 °C

To a stirred solution of 5-bromo-6-methylsulfamoylindoline, 55.92 g (0.19 mol) in 150 ml dioxane was added 41.79 gm (0.184 mol) of 2,3-dichloro-5,6-dicyanobenzoquinone at 25° C. The resulting brown solution was heated to 80° C. for 2 hours when thin layer chromatography using chloroform showed that the reaction was complete. The reaction mixture was allowed to cool, filtered through Celite and the filtrate concentrated under reduced pressure. The resulting brown solid was stirred in a mixture of methylene chloride/ether 50/50 and then filtered. This procedure was carried out two additional times and gave 35.2 g (63.9% by weight yield) of 5-bromo-6-methylsulfamoylindole.

1. temperatureto cool
2. filtrationfiltered through Celite
3. concentrationthe filtrate concentrated under reduced pressure
4. filtrationfiltered