반응 #79608

반응 방정식

methyl bromoacetate

Sodium hydride

9-[(3-methylphenyl)methyl]-2-methyl-4-hydroxy-5-carbamoyl carbazole

→

{9-[(3-methylphenyl)methyl]-2-methyl-5-carbamoylcarbazol-4-yl}oxyacetic acid, methyl ester

수율 76.0%

용매

ethyl acetate

DMF

THF

반응 조건

후처리

1. 1
   세척washed with H2O
2. 2
   추출The aqueous layer was extracted with ethyl acetate
3. 3
   추출The combined organic layers were extracted with saturated brine
4. 4
   건조dried over sodium sulfate
5. 5
   여과filtered
6. 6
   농축concentrated
7. 7
   기타The residue was purified by column chromatography on silica gel (elution with methylene chloride/acetone gradient)

실험 절차

60% Sodium hydride in mineral oil (79.8 mg, 2.0 mM) was added to a solution of 9-[(3-methylphenyl)methyl]-2-methyl-4-hydroxy-5-carbamoyl carbazole (0.55 g, 1.60 mM) in 56 mL DMF and 12 ml THF. After 10 minutes, methyl bromoacetate (0.20 ml, 2.16 mM) was added and the resultant mixture stirred at room temperature for 1 hour. The mixture was diluted with ethyl acetate and washed with H2O. The aqueous layer was extracted with ethyl acetate. The combined organic layers were extracted with saturated brine, dried over sodium sulfate, filtered, and concentrated. The residue was purified by column chromatography on silica gel (elution with methylene chloride/acetone gradient) to afford 0.51 g (76%) of {9-[(3-methylphenyl)methyl]-2-methyl-5-carbamoylcarbazol-4-yl}oxyacetic acid, methyl ester. 1H NMR (DMSO-d6) δ7.5 (m, 2H), 7.35 (dd, J=8 and 8 Hz, 1H), 7.2-7.1 (m, 2H), 7.05-6.95 (m, 4H), 6.85 (d, J=8 Hz, 1H), 6.45 (s, 1H), 5.6 (s, 2H), 4.9 (s, 2H), 3.75 (s, 3H), 2.4 (s, 3H), 2.2 (s, 3H). MS (FD) m/e 400, 417.

출처