反应详情

温度

70 °C

A stirred solution of 4-hydroxy-3-methoxy-N,N-bis(1-methylethyl)benzenecarboxamide (319 mg, 1.27 mmol) in 3.5 mL anhydrous N,N-dimethylformamide is treated with cesium carbonate (435 mg, 1.33 mmol) and ethyl 4-[5-bromopentoxy]benzenecarboximidoate (400 mg, 1.27 mmol) and heated at 70° C. for 1.0 hours. After cooling to room temperature, the reaction is partitioned between ethyl acetate and water and the organics washed with brine, dried over sodium sulfate and concentrated in vacuo to afford a yellow oil. This material is purified by chromatography on silica gel (22 g) with 30-75% ethyl acetate/hexanes as the eluent to afford ethyl 4-[5-[2-methoxy-4-[N,N-bis(1-methylethyl)aminocarbonyl]phenoxy]pentoxy]benzenecarboximidoate as a colorless oil.

1. temperatureAfter cooling to room temperature
2. customthe reaction is partitioned between ethyl acetate and water
3. washthe organics washed with brine
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated in vacuo
6. customto afford a yellow oil
7. customThis material is purified by chromatography on silica gel (22 g) with 30-75% ethyl acetate/hexanes as the eluent