申请人:Nycomed Imaging AS
公开号:US05419893A1
公开(公告)日:1995-05-30
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 compounds of formula I X--CHR.sub.1 NZ--(CHR.sub.1).sub.n --A--(CHR.sub.1).sub.m --NZ--CHR.sub.1 --X (I) (wherein each of the groups Z is a group --CHR.sub.1 X or the groups Z together are a group --(CHR.sub.1).sub.q --A'--(CHR.sub.1).sub.r --, where A' is an oxygen or sulphur atom or a group --N--Y; A is a group --N--Y or A--(CHR.sub.1).sub.m -- represents a carbon-nitrogen bond or, when the groups Z together are a group --(CHR.sub.1).sub.q --A'--(CHR.sub.1).sub.r --, A may also represent an oxygen or sulphur atom; each Y, which may be the same or different, is a group --(CHR.sub.1).sub.p --N(CHR.sub.1 X).sub.2 or a group --CHR.sub.1 X; each X, which may be the same or different, is a carboxyl group or a derivative thereof or a group R.sub.1 ; each R.sub.1, which may be the same or different, is a hydrogen atom, a hydroxyalkyl group or an optionally hydroxylated alkoxy or alkoxyalkyl group; n,m,p,q and r are each 2,3 or 4; with the provisos that at least two nitrogens carry a --CHR.sub.1 X moiety wherein X is a carboxyl group or a derivative thereof, that each --CHR.sub.1 X moiety is other than a methyl group, and that unless A' is oxygen or sulphur or A is N--(CHR.sub.1).sub.p --N(CHR.sub.1 X).sub.2 at least one R.sub.1 is other than hydrogen) and salts thereof.
提供了一些螯合剂,特别适用于制备用于磁共振成像、闪烁扫描、超声成像、放射治疗和重金属解毒的诊断和治疗剂,这些剂是I式化合物X-CHR.sub.1NZ-(CHR.sub.1).sub.n-A-(CHR.sub.1).sub.m-NZ-CHR.sub.1-X(I)的化合物,其中Z中的每个基团是基团-CHR.sub.1X或Z基团在一起是基团-(CHR.sub.1).sub.q-A'-(CHR.sub.1).sub.r-,其中A'是氧或硫原子或基团-N-Y;A是基团-N-Y或A-(CHR.sub.1).sub.m-表示碳-氮键或者当Z基团在一起是基团-(CHR.sub.1).sub.q-A'-(CHR.sub.1).sub.r-时,A也可以表示氧或硫原子;每个Y,可以相同也可以不同,是基团-(CHR.sub.1).sub.p-N(CHR.sub.1X).sub.2或基团-CHR.sub.1X;每个X,可以相同也可以不同,是羧基或其衍生物或基团R.sub.1;每个R.sub.1,可以相同也可以不同,是氢原子、羟基烷基或者是可选羟基化的烷氧基或烷氧基烷基;n,m,p,q和r分别为2、3或4;但必须满足至少有两个氮原子携带一个-CHR.sub.1X基团,其中X是羧基或其衍生物,每个-CHR.sub.1X基团不是甲基,除非A'是氧或硫或A是N-(CHR.sub.1).sub.p-N(CHR.sub.1X).sub.2,否则至少有一个R.sub.1不是氢。这些化合物的盐也包括在内。