反应详情

A dry 25 mL round bottom flask was charged with di(tert-butyl) 8-(2,4-dichlorophenyl)-3,4,4a,9b-tetrahydro-1H-pyrido[4,3-b]indole-2,5-dicarboxylate (0.38 g, 0.74 mmol), DMF (10 mL), N-bromosuccinimide (0.21 g, 1.11 mmol), and stirred at ambient temperature for 18 hours. The reaction was concentrated under high vacuum to remove DMF and partitioned between water and ethyl acetate (2X). The organics were combined, dried with MgSO4, filtered and concentrated to give 461 mg of a crude orange brown oil. Purification of the crude on a 40 gram silica Biotage column using 10% ethyl acetate in heptane gave 217 mg (50%) of di(tert-butyl) 6-bromo-8-(2,4-dichlorophenyl)-3,4,4a,9b-tetrahydro-1H-pyrido[4,3-b]indole-2,5-dicarboxylate as a pale yellow foam.

1. concentrationThe reaction was concentrated under high vacuum
2. customto remove DMF
3. custompartitioned between water and ethyl acetate (2X)
4. dry with materialdried with MgSO4
5. filtrationfiltered
6. concentrationconcentrated
7. customto give 461 mg of a crude orange brown oil
8. customPurification of the crude on a 40 gram silica Biotage column