反应 #700510

反应方程式

6-bromo-2-naphthalenecarboxylic acid

Compound M

6-bromo-2-naphthalenecarboxylic acid

ethanol

sulfuric acid

→

title compound

Ethyl 6-bromo-2-naphthalenecarboxylate

反应条件

后处理

1. 1
   温度The solution was refluxed for 30 minutes
2. 2
   其他the reaction mixture partitioned between pentane (100 ml) and water (100 ml)
3. 3
   萃取The aqueous phase was extracted with pentane (100 ml)
4. 4
   洗涤the combined organic layers washed with saturated aqueous NaCl (100 ml)
5. 5
   干燥dried (MgSO4)
6. 6
   浓缩concentrated
7. 7
   其他to yield an off-white solid
8. 8
   其他Purification by flash

实验过程

To a solution of 6-bromo-2-naphthalenecarboxylic acid (Compound M) 3.1 g, (12.43 minol) in ethanol (30 ml, 23.55 g, 511.0 mmol) was added 18M sulfuric acid (2 ml). The solution was refluxed for 30 minutes, cooled to room temperature, and the reaction mixture partitioned between pentane (100 ml) and water (100 ml). The aqueous phase was extracted with pentane (100 ml) and the combined organic layers washed with saturated aqueous NaCl (100 ml), dried (MgSO4), and concentrated to yield an off-white solid. Purification by flash. chromatography (silica, 10% EtOAc-hexane) afforded the title compound as a white solid. 1H NMR (CDCl3): δ 8.58 (1H, br s), 8.10 (1H, dd, J=1.7, 9 Hz), 8.06 (1H, d, J=2 Hz), 7.83 (1H, d, J=9 Hz), 7.80 (1H, d, J=9 Hz), 7.62 (1H, dd, J=2, 9 Hz).

来源