反应详情

A mixture of 7.6 g of 1-(1-phenylethyl)piperazine, 3.2 g of 1-bromo-3-chloropropane and 50 ml of reagent ethanol was refluxed for 5 hours. The solvent was then removed under vacuum, 75 ml of water were added, and the mixture was extracted with ether (3×150 ml). The ether extract was evaporated to an oil and chromatographed on silica, the eluant being CH2Cl2 /CH3OH/ammonium hydroxide (45:5:1). The resulting yellow oil was dissolved in 150 ml of ether and precipitated with excess anhydrous hydrogen chloride to yield 6.1 g (51% of theory) of 1,3-bis[4-(1-phenylethyl) -1-piperazinyl]propane tetrahydrochloride. The product was recrystallized from ethanol/water to yield a white crystalline solid (m.p. 236°-246° C., with decomp.).

1. temperaturewas refluxed for 5 hours
2. customThe solvent was then removed under vacuum, 75 ml of water
3. additionwere added
4. extractionthe mixture was extracted with ether (3×150 ml)
5. extractionThe ether extract
6. customwas evaporated to an oil
7. customchromatographed on silica
8. dissolutionThe resulting yellow oil was dissolved in 150 ml of ether
9. customprecipitated with excess anhydrous hydrogen chloride