反应详情

To 4-(2-benzyloxy-4-ethylphenoxy)-3-fluoroaniline (500 mg, 1.48 mmol) in 25 ml of ethanol was added 3-bromopropylphthalimide (440 mg, 1.64 mmol). The mixture was refluxed for 2 days. The reaction mixture was diluted with ethylacetate and washed with water, saturated brine solution, dried over anhydrous Na2SO4 and concentrated. The crude obtained was passed through a silica gel column using 15% ethylacetate in petroleum ether as eluant. The LCMS of the obtained mixture showed 53% mass of the coupled product. This was taken in 25 ml of ethanol and added 7 ml of hydrazine hydrate and refluxed overnight. Ethanol was removed in vacuo and added 20% KOH solution (20 ml) to the residue. The aqueous fraction was then extracted with dichlormethane and the combined dichloromethane fraction was dried over anhydrous Na2SO4 and concentrated. The crude product obtained was purified by column chromatography using 5% methanol in dichloromethane as eluant to obtain 110 mg (18.8% after 2 steps) of the N1-[4-(2-Benzyloxy-4-ethylphenoxy)-3-fluorophenyl]propan-1,3-diamine.

1. temperatureThe mixture was refluxed for 2 days
2. washwashed with water, saturated brine solution
3. dry with materialdried over anhydrous Na2SO4
4. concentrationconcentrated
5. customThe crude obtained
6. temperaturerefluxed overnight
7. customEthanol was removed in vacuo
8. additionadded 20% KOH solution (20 ml) to the residue
9. extractionThe aqueous fraction was then extracted with dichlormethane
10. dry with materialthe combined dichloromethane fraction was dried over anhydrous Na2SO4
11. concentrationconcentrated
12. customThe crude product obtained
13. customwas purified by column chromatography