反应详情

5-Cyclohexyl-1H-indole-2,3-dione (1 equivalent), ethane-1,2-diol (5 equivalents) and p-toluenesulphonic acid (0.02 equivalents) in dry toluene were heated under reflux overnight with azeotropic removal of water. The reaction mixture was cooled, washed with saturated sodium bicarbonate solution, and then worked up in the usual manner to afford the title compound.

1. temperatureThe reaction mixture was cooled
2. washwashed with saturated sodium bicarbonate solution