申请人:NYCOMED IMAGING AS
公开号:EP0466200A1
公开(公告)日:1992-01-15
There are provided chelating agents particularly useful for the preparation of diagnostic and therapeutic agents for magnetic resonance imaging, scintigraphy, ultrasound imaging, radiotherapy and heavy metal detoxification, said agents being compound of formula
(wherein
each X may independently represent a carboxyl group or a derivative thereof or a group R₁;
each group R₁ may independently represent a hydrogen atom, a hydroxylalkyl group, an optionally mono- or polyhydroxylated alkoxy or alkoxyalkyl group;
n, m, q, r are each 2, 3 or 4,
with the provisos that at least two nitrogens carry a -CHR₁X moiety, wherein X is a carboxyl group or a derivative thereof,
that each -CHR₁X moiety represents other than a methyl group,
that at least one -R₁ group represents other than hydrogen and that where all but one -CHR₁X groups are -CH₂COOH, then the remaining -CHR₁X group may not represent a hydroxyethyl, 2-hydroxypropyl or 2,3-dihydroxypropyl group) or a salt or metal chelate thereof.
所提供的螯合剂特别适用于制备用于磁共振成像、闪烁扫描、超声波成像、放疗和重金属解毒的诊断和治疗剂,所述螯合剂为以下式子的化合物
其中
每个 X 可独立代表一个羧基或其衍生物或一个基团 R₁;
每个基团 R₁ 可独立代表氢原子、羟烷基、任选单羟基或多羟基烷氧基或烷氧基烷基;
n、m、q、r 分别为 2、3 或 4、
但至少有两个硝基带有 -CHR₁X 分子,其中 X 为羧基或其衍生物、
每个-CHR₁X 分子代表的不是甲基、
至少有一个-CHR₁基团代表氢以外的基团,并且如果除一个-CHR₁X 基团以外的所有基团均为-CH₂COOH,则剩余的-CHR₁X 基团不得代表羟乙基、2-羟丙基或 2,3-二羟丙基)或其盐或金属螯合物。