[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH2:11][CH2:12][NH:13][C:14]2[N:22]=[C:21]3[C:17]([N:18]=[CH:19][NH:20]3)=[C:16]([N:23]3[CH2:28][CH2:27][O:26][CH2:25][CH2:24]3)[N:15]=2)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10].[Br:29]Br>O1CCOCC1.O>[Br:29][C:19]1[NH:20][C:21]2[C:17]([N:18]=1)=[C:16]([N:23]1[CH2:28][CH2:27][O:26][CH2:25][CH2:24]1)[N:15]=[C:14]([NH:13][CH2:12][CH2:11][C:5]1[CH:6]=[CH:7][C:8]([O:9][CH3:10])=[C:3]([O:2][CH3:1])[CH:4]=1)[N:22]=2To a solution of [2-(3,4-dimethoxy-phenyl)-ethyl]-(6-morpholin-4-yl-9H-purin-2-yl) amine (1.16 g, 3 mmol) in dioxane (75 mL) was added bromine (0.180 mL, 3.3 mmol) in dioxane (5 mL) dropwise over a period of 1 hour. The mixture was stirred at room temperature for additional 4 hours and diluted with water (25 mL) and extracted with EtOAc. The organic phase was washed with brine, water, dried over Na2SO4. The solvent was evaporated in vacuo and solid was washed with methanol to give (8-bromo-6-morpholin-4-yl-9H-purin-2-yl)-[2-(3,4-dimethoxy-phenyl)-ethyl]-amine as a white solid (1.05 g, 75% yield).
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