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    • 7. 发明授权
    • Manganese (II) chelates
    • 锰(II)螯合物
    • US5155224A
    • 1992-10-13
    • US370478
    • 1989-06-23
    • Scott M. RocklageWilliam P. CacherisGene Jamieson
    • Scott M. RocklageWilliam P. CacherisGene Jamieson
    • A61K49/06C07C229/16C07D213/66C07D257/02C07D273/00C07F9/6558
    • C07D213/66A61K49/06C07C229/16C07D257/02C07D273/00C07F9/65583
    • The process of this invention for preparing Mn(II) chelate comprises forming the Mn(II) chelate by mixing manganese (II) oxide (insoluble) with an aqueous suspension comprising a molar equivalent or molar excess of the insoluble protonated chelating compound at a temperature of from 20.degree.to 50.degree. C. When the reaction is carried out with a protonated chelating agent in the absence of base, a precipitate of the protonated Mn(II) chelate is formed. A low osmolarity MN(II) chelate solution can be formed from the precipitates by dissolving them in an aqueous solution of base. When the initial chelate forming reaction is carried out in a solution containing a molar equivalent or excess of sodium hydroxide, a low osmolarity solution of the Mn(II) chelate is directly formed with most chelating agents. Preferred chelating compounds for this process include DPDP, DTPA, DCTA, EDTP, DOTA, DOXA, DO3A and EDTA. The Nm(II) chelate precipitates and low osmolarity solutions formed by the above processes are also aspects of this invention.
    • 本发明制备Mn(II)螯合物的方法包括通过将锰(II)氧化物(不溶性)与包含摩尔当量或摩尔过量的不溶性质子化螯合化合物的水悬浮液在温度下混合形成Mn(II)螯合物 为20〜50℃。当不存在碱时,用质子化螯合剂进行反应时,形成质子化的Mn(II)螯合物的沉淀物。 通过将沉淀物溶解在碱的水溶液中,可以从沉淀物形成低摩尔渗透浓度的MN(II)螯合溶液。 当初始螯合物形成反应在含有摩尔当量或过量氢氧化钠的溶液中进行时,Mn(II)螯合物的低渗透压溶液与大多数螯合剂直接形成。 用于该方法的优选螯合化合物包括DPDP,DTPA,DCTA,EDTP,DOTA,DOXA,DO3A和EDTA。 通过上述方法形成的Nm(II)螯合物沉淀物和低摩尔渗压浓度溶液也是本发明的一个方面。