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    • 2. 发明授权
    • Process for the preparation of N-(2-sulfatoethyl)-piperazine in high
purity
    • 制备高纯度N-(2-硫杂乙基) - 哌嗪的方法
    • US5596099A
    • 1997-01-21
    • US405381
    • 1995-03-15
    • Michael MeierHeinz-Georg Kautz
    • Michael MeierHeinz-Georg Kautz
    • C07D295/08C07D295/088D06P5/00
    • C07D295/088
    • A process for the preparation of N-(2-sulfatoethyl)-piperazine in high purity, which comprises reacting N-(2-hydroxyethyl)piperazine in a mixture of highly--or relatively highly--concentrated sulfuric acid and oleum or chlorosulfonic acid at temperatures of from about 80.degree. to about 250.degree. C., transferring the resulting sulfonation mixture to a water-miscible aliphatic alcohol, isolating the N-(2-sulfatoethyl)piperazine sulfate formed, treating the N-(2-sulfatoethyl)piperazine sulfate, still moist with alcohol, at temperatures of from about 35.degree. to about 90.degree. C. with a basic compound in a mixture of a (C.sub.1 -C.sub.2)-alkanol and water, separating off the precipitated sulfate of the basic compound employed, and isolating the N-(2-sulfatoethyl)piperazine formed, by the addition of (C.sub.1 -C.sub.2)-alkanol.
    • 一种高纯度制备N-(2-硫酸基乙基) - 哌嗪的方法,其包括在高度相对高浓度的硫酸和发烟硫酸或氯磺酸的混合物中使N-(2-羟乙基)哌嗪反应, 将所得的磺化混合物转移到水混溶性脂族醇中,分离所形成的N-(2-硫酸基乙基)哌嗪硫酸盐,处理硫酸N-(2-硫酸根合)哌嗪, 在约35℃至约90℃的温度下用碱性化合物在(C1-C2) - 烷醇和水的混合物中仍然用醇分离,分离出所用碱性化合物的沉淀硫酸盐,并分离 通过加入(C 1 -C 2) - 烷醇形成N-(2-硫酸基乙基)哌嗪。