反应详情

A mixture of the 9-[(2-pyridyl)methyl]-4-hydroxy-5-carbamoyl carbazole (216 mg, 0.68 mmol) and Cs2CO3 (550 mg; 1.69 mmol) in 5 mL DMF was treated with methyl bromoacetate (0.08 mL; 0.85 mmol). The reaction was stirred until tlc analysis indicated complete consumption of starting material (2 hours). The mixture was concentrated and the residue taken up in H2O (50 mL). The aqueous layer was saturated with solid NaCl and was extracted five times with THF. The combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated. The solid was triturated with EtOAc to afford 205 mg (77%) of the {9-[(2-pyridyl)methyl]-5-carbamoylcarbazol-4-yl}oxyacetic acid, methyl ester as an off white solid. 1H NMR (DMSO-d6) δ8.47 (d, 1H, J=4.9 Hz), 7.66-7.57 (m, 2H), 7.48 (br s, 1H), 7.38-7.27 (m, 2H), 7.24-7.19 (m, 2H), 7.19 (br s, 1H), 7.04 (d, 1H, J=7.3 Hz), 6.87 (d, 1H, J=7.8 Hz), 6.56 (d, 1H, J=7.8 Hz), 5.71 (s, 2H), 4.89 (s, 2H), and 3.69 (s, 3H). IR (CHCl3, cm−1) 3380, 3140, 1737, 1675, 1500, 1457, 1354, 1340, 1242, 1158, 772, and 715. MS (ES) m/e 390 (M+1).

1. customconsumption of starting material (2 hours)
2. concentrationThe mixture was concentrated
3. extractionwas extracted five times with THF
4. dry with materialThe combined organic layers were dried over anhydrous sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. customThe solid was triturated with EtOAc