2-[2-(1H-indol-3-yl)ethyl]-1H-Isoindole-1,3(2H)-dione → 2-[2-(2-bromo-1H-indol-3-yl)-ethyl]-isoindole-1,3-dione
Reaction equation
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]([CH2:10][CH2:11][N:12]2[C:20](=[O:21])[C:19]3[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=3)[C:13]2=[O:22])=[CH:2]1.C1C=C[NH+]=CC=1.[Br:29][Br-]Br>O1CCCC1.C(Cl)(Cl)Cl>[Br:29][C:2]1[NH:1][C:9]2[C:4]([C:3]=1[CH2:10][CH2:11][N:12]1[C:13](=[O:22])[C:14]3[C:19](=[CH:18][CH:17]=[CH:16][CH:15]=3)[C:20]1=[O:21])=[CH:5][CH:6]=[CH:7][CH:8]=2Participants
4
Reactant 1
Product 1
Reagents, catalysts & solvents 2
Conditions
- Temperature
- 0 °C
Procedure
To a solution of 2-[2-(1H-indol-3-yl)-ethyl]-isoindole-1,3-dione (1.0 g in a mixture of 10 mL dry tetrahydrofuran and 10 mL dry chloroform) at 0° C. was added pyridinium bromide perbromide (1.14 g) and the reaction stirred at 0° C. After 50 minutes, the reaction was quenched by the addition of saturated sodium bicarbonate and extracted with ethyl acetate. The organic portion was washed with saturated sodium bicarbonate (3×) and 0.3M sodium bisulfate (3×) then dried over magnesium sulfate. Purification of the concentrate by flash chromatography on silica gel (hexane:ethyl acetate, 3:1) gave the title compound (1.2 g).