反应详情

A mixture of 9-[(cyclohexyl)methyl]-4-hydroxy-5-carbamoyl carbazole (60 mg, 0.186 mmol) and Cs2CO3 (150 mg; 0.460 mmol) in 2 mL of DMF was treated with methyl bromoacetate (0.023 mL; 0.242 mmol). The reaction was stirred for 2 hours at ambient temperature, then it was diluted with EtOAc and H2O (10 mL each). The aqueous layer was saturated with solid NaCl and extracted with EtOAc (2×10 mL). The combined organic layers were washed with H2O (2×25 mL), dried over anhydrous Na2SO4, filtered and concentrated in vacuo. Purification of the crude residue by flash chromatography on silica gel (elution with a gradient of 0% to 90% EtOAc/hexanes) followed by trituration with Et2O/EtOAc afforded 45 mg (0.114 mmol; 61%) of title compound as an off-white solid. MS (ES) m/e 395 (M+1), 378 (M+H—NH3), 453 (M+AcO−).

1. extractionextracted with EtOAc (2×10 mL)
2. washThe combined organic layers were washed with H2O (2×25 mL)
3. dry with materialdried over anhydrous Na2SO4
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customPurification of the crude residue by flash chromatography on silica gel (
7. washelution with a gradient of 0% to 90% EtOAc/hexanes)