反应详情

4-(Chlorosulphonyl)benzoic acid (0.75 g) was added to a solution of 1-(3-chlorophenyl)piperazine dihydrochloride (0.90 g) in triethylamine (2.4 ml) and dichloromethane (50 ml). The reaction mixture was stirred overnight at room temperature then concentrated in vacuo. The resulting solid was suspended in N,N-dimethylformamide (50 ml) and carbonyl diimidazole (0.55 g) was added. The reaction mixture was stirred for one hour at room temperature then 1-(4-pyridyl)piperazine (0.55 g, 3.4 mmol) was added. The reaction mixture was stirred for three hours, then concentrated in vacuo. The resulting solid was separated between ethyl acetate (100 ml) and water (100 ml). The ethyl acetate layer was washed with aqueous saturated sodium bicarbonate solution (100 ml) then dried over magnesium sulphate, filtered and concentrated in vacuo. The resulting yellow oil was subjected to chromatography (SiO2: 10%-12% MeOH/EtOAc) to yield 1-[4-(4-(3-chlorophenyl)piperazin-1-ylsulphonyl)benzoyl]-4-(4-pyridyl)piperazine as a white solid (300.1 mg);

1. concentrationthen concentrated in vacuo
2. additioncarbonyl diimidazole (0.55 g) was added
3. stirringThe reaction mixture was stirred for one hour at room temperature
4. stirringThe reaction mixture was stirred for three hours
5. concentrationconcentrated in vacuo
6. customThe resulting solid was separated between ethyl acetate (100 ml) and water (100 ml)
7. washThe ethyl acetate layer was washed with aqueous saturated sodium bicarbonate solution (100 ml)
8. dry with materialthen dried over magnesium sulphate
9. filtrationfiltered
10. concentrationconcentrated in vacuo