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    • 23. 发明授权
    • Method of isolating radioactive perrhenate or pertechnetate from an
aqueous solution
    • 从水溶液中分离放射性高铼酸盐或高锝酸盐的方法
    • US4778672A
    • 1988-10-18
    • US802779
    • 1985-11-27
    • Edward A. DeutschJean-Luc Vanderheyden
    • Edward A. DeutschJean-Luc Vanderheyden
    • A61K51/04C07B59/00G21G4/08A61K43/00C01G47/00C01G57/00
    • G21G4/08A61K51/04C07B59/004A61K2123/00
    • Pure perihenate is isolated from a aqueous crude solution of perrhenate by first associating the perrherate with a lipophilic counter ion such as tetrabutyl ammonium. This is added to the solution in a form such as tetrabutyl ammonium bromide. Tetrabutyl ammonium perrhenate is formed. The aqueous mixture is then added to a reverse phase separation column such as a C.sub.18 Sep Pak filter which has been previously loaded with the lipophilic counter ion. The aqueous portion of the crude mixture is eluted from the column with water. Subsequently the purified perrhenate associated with the lipophilic counter ion is removed with a less polar solvent such as ethanol. Pertechnetate can also be separated from an aqueous mixture in the same manner. These procedures are particularly suited for isolating relatively pure radioactive forms of perrhenate and pertechnetate such as Re.sup.186 O.sub.4.sup.-, Re.sup.188 O.sub.4.sup.-, and .sup.99m TcO.sub.4.sup.-.
    • 通过首先将苦参碱与亲脂性抗衡离子如四丁基铵缔合,从硬质酸水溶液的粗水溶液中分离出纯的过氧化钙。 将其以诸如四丁基溴化铵的形式加入到溶液中。 形成高铼酸四丁基铵。 然后将含水混合物加入到反相分离柱如C18 Sep Pak过滤器中,其已经预先装载了亲脂性抗衡离子。 粗制混合物的水溶液部分用水从柱中洗脱出来。 随后,用极性较小的溶剂如乙醇除去与亲油性抗衡离子缔合的纯化的高铼酸盐。 高锝酸盐也可以以相同的方式从含水混合物中分离出来。 这些方法特别适用于分离相对纯的放射性形式的高铼酸盐和高锝酸盐,如Re186O4-,Re188O4-和99mTcO4-。
    • 30. 发明授权
    • Technetium (III/II) imaging agents
    • 锝(III / II)成像剂
    • US5002754A
    • 1991-03-26
    • US207281
    • 1988-06-15
    • Edward A. Deutsch
    • Edward A. Deutsch
    • A61K51/00A61K51/04C07F13/00C07H23/00
    • A61K51/0476C07F13/005C07H23/00A61K2123/00
    • A ligated technetium (III/II) complex is useful as a brain perfusion imaging agent. The complex has a technetium (III/II) center surrounded by six ligating moieties. The complex preferably has a reduction potential Tc(III) to Tc(II) which is less than about +0.6 volts vs Ag/AgCl (3M NaCl) and at least low enough to be oxidized in vivo after crossing the blood brain diffusion barrier. The technetium complex has six ligating moieties, four of which use phosphorous, arsenic, or nitrogen as ligating atoms. The remaining two ligands use sulfur or selenium to complex to the Tc center. These ligands are modified to establish an effective oxidation potential of the Tc(II) thus providing the necessary redox potential for in vivo oxidation.
    • 连接的锝(III / II)复合物可用作脑灌注成像剂。 该复合物具有由六个连接部分包围的锝(III / II)中心。 复合物优选具有比Ag / AgCl(3M NaCl)低约+0.6伏特的还原电位Tc(III)至Tc(II),并且至少足够低以在穿过血脑扩散屏障后在体内被氧化。 锝络合物具有六个结合部分,其中四个使用磷,砷或氮作为连接原子。 剩余的两个配体使用硫或硒与Tc中心复合。 这些配体被修饰以建立Tc(II)的有效氧化电位,从而为体内氧化提供必要的氧化还原电位。