反应详情

温度

0 °C

To a solution of diethyl 2-methyl-6b,9,10,10a-tetrahydro-1H-pyrido[3′,4′:4,5]pyrrolo[1,2,3-de]quinoxaline-3,8(2H,7H)-dicarboxylate (40 mg, 0.1 mmol) in DMF (10 mL) at 0° C. was added NBS (20 mg, 0.11 mmol) and stirred at 0° C. for 2 hours. The solution was diluted with water (10 mL), and extracted with EtOAc (2×20 mL). The combined extracts were dried over magnesium sulfate, concentrated, and purified by flash chromatography to afford diethyl 5-bromo-2-methyl-6b,9,10,10a-tetrahydro-1H-pyrido[3′,4′:4,5]pyrrolo[1,2,3-de]quinoxaline-3,8(2H,7H)-dicarboxylate (40 mg, 88%) as a clear oil. MS [M+H]+ 454.

1. extractionextracted with EtOAc (2×20 mL)
2. dry with materialThe combined extracts were dried over magnesium sulfate
3. concentrationconcentrated
4. custompurified by flash chromatography