申请人:Nycomed Salutar
公开号:US05650133A1
公开(公告)日:1997-07-22
This invention relates to dichelants, in particular compounds having two macrocyclic chelant groups linked by a bridge containing an ester or amide bond, especially compounds of formula Vb ##STR1## (wherein each X which may be the same or different is NZ, O or S, at least two Xs being NZ; each Z is a group R.sup.1 or a group CR.sup.1.sub.2 Y, at least one Z, and preferably 2 or 3 Zs, on each macrocyclic ring being a group CR.sup.1.sub.2 Y; each Y is a group CO.sub.2 H, PO.sub.3 H, SO.sub.3 H, CONR.sup.1.sub.2, CON(OR.sup.1)R.sup.1, CNS or CONR.sup.1 NR.sup.1.sub.2, preferably COOH; m is 0 or 1 or 2, preferably 1; each n is 2 or 3, preferably 2; q is 1 or 2, preferably 1; each R.sup.1 which may be the same or different is a hydrogen atom or an alkyl group optionally substituted by one or more hydroxy and/or alkoxy groups; and D is a bridging group having a molecular weight of less than 1000, preferably less than 500, joining two macrocyclic rings via at least one amide or ester bond) and salts and metal chelates thereof.
该发明涉及二螯合剂,特别是具有两个大环螯合基团的化合物,这些基团通过含有酯或酰胺键的桥连接,特别是具有以下式Vb的化合物##STR1##(其中每个X可能相同也可能不同,为NZ,O或S,至少两个X为NZ;每个Z为基团R.sup.1或基团CR.sup.1.sub.2Y,每个大环螯合环上至少一个Z,最好是2个或3个Z为基团CR.sup.1.sub.2Y;每个Y为基团CO.sub.2H,PO.sub.3H,SO.sub.3H,CONR.sup.1.sub.2,CON(OR.sup.1)R.sup.1,CNS或CONR.sup.1NR.sup.1.sub.2,最好为COOH;m为0或1或2,最好为1;每个n为2或3,最好为2;q为1或2,最好为1;每个R.sup.1可能相同也可能不同,为氢原子或一个或多个羟基和/或烷氧基可选择地取代的烷基基团;D为分子量小于1000,最好小于500的桥连接基团,通过至少一个酰胺或酯键连接两个大环螯合环)及其盐和金属螯合物。