Reaktion #79683

Reaktionsgleichung

9-[(3-methylphenyl)methyl]-4-hydroxy-5-carbamoyl carbazole

methyl bromoacetate

→

{9-[(3-methylphenyl)methyl]-5-carbamoylcarbazol-4-yl}oxyacetic acid, methyl ester

Ausbeute 66.0%

Lösungsmittel

DMF

ethyl acetate

Reaktionsbedingungen

Aufarbeitung

1. 1
   Waschenwashed with H2O, and saturated brine
2. 2
   Trocknendried over magnesium sulfate
3. 3
   Filtrationfiltered
4. 4
   Einengenconcentrated
5. 5
   SonstigeThe residue was purified by column chromatography on silica gel (elution with ethyl acetate)

Vorschrift

40% Methanolic Triton B (0.45 mL, 0.99 mM) was added to a solution of the 9-[(3-methylphenyl)methyl]-4-hydroxy-5-carbamoyl carbazole (100 mg, 0.30 mM) in 8 mL DMF at room temperature. After 3 minutes, methyl bromoacetate (115 mg, 0.72 mM) was added and the resultant mixture stirred at room temperature for 24 hours. The mixture was diluted with ethyl acetate, washed with H2O, and saturated brine, dried over magnesium sulfate, filtered, and concentrated. The residue was purified by column chromatography on silica gel (elution with ethyl acetate) to afford 80 mg (66%) of the {9-[(3-methylphenyl)methyl]-5-carbamoylcarbazol-4-yl}oxyacetic acid, methyl ester as a white solid. 1H NMR (DMSO-d6) δ7.6 (d, 1H, J=8 Hz), 7.55 (br s, 1H), 7.45-7.0 (m, 8H), 6.9 (d, 1H, J=8 Hz), 6.6 (d, 1H, J=8 Hz), 5.65 (s, 2H), 4.9 (s, 2H), 3.75 (s, 3H), and 2.2 (s, 3H). IR (KBr, cm−1) 3367, 3157, 1760, 1642, 1589, 1499, 1455, 1424, 1328, 1216, 1151, 1102, 772, and 714. MS (FD) m/e 402.

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