反应详情

40% Methanolic Triton B (0.24 mL, 0.53 mM) was added to a solution of the 9-[(2-cyanophenyl)methyl]-4-hydroxy-5-carbamoyl carbazole (140 mg, 0.41 mM) in 5 mL DMF at room temperature. After 15 minutes, methyl bromoacetate (130 mg, 0.82 mM) was added and the resultant mixture stirred at room temperature for 24 hours. The mixture was diluted with ethyl acetate, washed four times with H2O, 1 N HCl, H2O, sat. NaHCO3, and saturated brine, dried over magnesium sulfate, filtered, and concentrated. The residue was purified by column chromatography on silica gel (elution with gradient methylene chloride/ethyl acetate/THF) to afford 116 mg (68%) of the {9-[(2-cyanophenyl)methyl]-5-carbamoylcarbazol-4-yl}oxyacetic acid, methyl ester as a white solid. 1H NMR (CDCl3) δ7.75 (d, 1H, J=8 Hz), 7.5-7.2 (m, 6H), 6.95 (d, 1H, J=8 Hz), 6.6 (d, 2H, J=8 Hz),), 6.3 (br s, 1H), 6.1 (br s, 1H), 5.75 (s, 2H), 4.9 (s, 2H), and 3.8 (s, 3H). IR (KBr, cm−1) 2228, 1732, and 1675. MS (ES) m/e 412, 414.

1. washwashed four times with H2O, 1 N HCl, H2O, sat. NaHCO3, and saturated brine
2. dry with materialdried over magnesium sulfate
3. filtrationfiltered
4. concentrationconcentrated
5. customThe residue was purified by column chromatography on silica gel (elution with gradient methylene chloride/ethyl acetate/THF)