反应详情

1.7 g of 1-(4-aminobenzoyl)-4-[2-(4-chlorophenyl)ethyl]piperazine and 0.55 g of triethylamine are introduced into 25 ml of methylene chloride. A solution of 0.6 g of chloroacetyl chloride is added dropwise thereto. The dark solution is left to stand overnight, diluted with 50 ml of methylene chloride, washed with 1N sodium hydroxide solution, dried over magnesium sulfate and concentrated by evaporation. The crystallisate so obtained is recrystallised from acetone, yielding 1-(4-chloroacetylaminobenzoyl)-4-[2-(4-chlorophenyl)ethyl]piperazine having a melting point of 146°-147°.

1. waitThe dark solution is left
2. washwashed with 1N sodium hydroxide solution
3. dry with materialdried over magnesium sulfate
4. concentrationconcentrated by evaporation
5. customThe crystallisate so obtained
6. customis recrystallised from acetone