申请人:SALUTAR, INC.
公开号:EP0369497A1
公开(公告)日:1990-05-23
A process is provided for the preparation of Mn(II) chelates for use as contrast agents in magnetic resonance imaging, said process comprising reacting insoluble manganese (II) oxide with an aqueous suspension comprising a molar equivalent or molar excess of an insoluble protonated chelating compound conveniently at a temperature of from 20 to 50°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 base, a low osmolarity solution of the Mn(II) chelate is directly formed with most chelating agents. The Mn(II) chelate precipitates and low osmolarity solutions formed by the above processes are also aspects of this invention.
提供了一种制备用作磁共振成像造影剂的锰(II)螯合物的工艺,所述工艺包括将不溶性氧化锰(II)与含有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 20 至 50°C 的温度下反应。当在没有碱的情况下与质子化螯合剂进行反应时,会形成质子化锰(II)螯合物沉淀。将沉淀物溶解在碱的水溶液中,可形成低渗透压的 Mn(II)螯合物溶液。当初始螯合物形成反应在含有摩尔当量或过量碱的溶液中进行时,锰(II)螯合物的低渗透压溶液可与大多数螯合剂直接形成。通过上述工艺形成的锰(II)螯合物沉淀物和低渗透压溶液也是本发明的内容。