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    • 3. 发明授权
    • Metabolically cleavable dendrimeric polychelants
    • US5976493A
    • 1999-11-02
    • US702693
    • 1996-11-08
    • Lawrence MargerumJoan CarvalhoMartha GarrityJere Douglas Fellmann
    • Lawrence MargerumJoan CarvalhoMartha GarrityJere Douglas Fellmann
    • A61K49/00A61K49/08A61K49/12A61K51/06C07D259/00C08G83/00C09K3/00A61K51/04A61B5/055
    • A61K49/124A61K49/085A61K49/12A61K51/065C07D259/00C08G83/00Y10S424/16
    • The invention provides polychelant compounds which are useful for example in diagnostic imaging procedures and which are degradable in vivo to release excretable fragments. Such compounds conveniently are of the formula (I): R.sup.1 (X.sup.1 R.sup.2 ((X.sup.2).sub.p L).sub.n).sub.m (where X.sup.1 is a linker moiety metabolically cleavable to release R.sup.1 X.sup.3.sub.m and X.sup.4 R.sup.2 ((X.sup.2).sub.p L).sub.n fragments where X.sup.3 and X.sup.4 are the cleavage residues of X.sup.1 ; R.sup.1 X.sup.3.sub.m is a biotolerable polymer, preferably a substantially monodisperse polymer and especially one with a molecular weight below 40,000 D, particularly below 30,000 D and especially below 20,000 D, for example a first to sixth generation dendrimer; X.sup.4 R.sup.2 ((X.sup.2).sub.p L).sub.n is a polychelant fragment having a molecular weight below 40,000 D, preferably below 30,000 D, especially below 20,000 D, each such moiety preferably being the same; p is 0 or 1; X.sup.2, where present, is a linker moiety metabolically cleavable to release a monochelant fragment; each L is a macrocyclic chelant moiety, wherein the macrocyclic skeleton preferably has 9 to 25 ring members and preferably is an optionally oxygen or sulphur interrupted polyazacycloalkane; R.sup.2 ((X.sup.2).sub.p).sub.n is a straight chain or branched backbone moiety, preferably providing a chain of up to 20 atoms between each L group and the X.sup.1 moiety to which it is joined and a chain of up to 25 atoms between each pair of L groups linked thereby, such chains conveniently being nitrogen and/or oxygen and/or sulphur interrupted carbon chains; each n is an integer having a value of at least 2, preferably a value of 2 to 25, especially 2 to 12; and each m is an integer having a value of at least 2, preferably a value of up to 200, especially 3 to 100, such that the total number of L groups in the polychelant of formula (I) is at least 20, preferably 50 to 200), having a molecular weight of at least 30,000 D, preferably at least 40,000 D, and especially preferably 50,000 to 150,000 D, and metal chelates and salts thereof.
    • 5. 发明授权
    • Polychelants as contrast enhancing agents
    • Polychelants作为对比增强剂
    • US5958373A
    • 1999-09-28
    • US615241
    • 1996-06-13
    • Martha GarrityShaun Paul CroftsJoan CarvalhoPer StrandeHarald Dugstad
    • Martha GarrityShaun Paul CroftsJoan CarvalhoPer StrandeHarald Dugstad
    • A61K31/395A61K49/00A61K49/04A61P39/02C07D257/02C07D519/00A61B5/055
    • A61K49/0002C07D257/02Y10S514/836
    • The present invention provides a polychelant compound of formula (VII), (wherein each X which may be the same or different is NZ, O or S, at least two Xs being NZ; B is (CR.sup.1 Y) or --N(CR.sup.1.sub.2 Y)--; each Z is a group R.sup.1 or a group CR.sup.1.sub.2 Y, at least one Z 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 ; m is 0 or 1 or 2; each n is 2 or 3; q is 0 or 1 when B is (CR.sup.1 Y) and 2 when B is N(CR.sup.1.sub.2 Y); p is an integer having a value of at least 2; each R.sup.1 which may be the same or different is a hydrogen atom or an alkyl, aryl or aralkyl group optionally substituted by one or more hydroxy or alkoxy groups, or two R.sup.1 groups on ring atoms or in Z groups together represent a linker group L; each L which may be the same or different represents a bond or an organic linker group having a molecular weight of less than 1000 and salts and chelates thereof. These compounds, especially the diand trichelates with paramagnetic or heavy metal ions are especially useful as diagnostic imaging contrast agents.
    • PCT No.PCT / GB94 / 01931 Sec。 371日期:1996年6月13日 102(e)日期1996年6月13日PCT 1994年9月6日PCT公布。 公开号WO95 / 07270 日期:1995年3月16日本发明提供了式(VII)所示的聚合物化合物,其中每个X可以相同或不同,为NZ,O或S,至少两个X为NZ; B为(CR1Y)或 - N(CR12Y) - ;各Z为基团R1或基团CR12Y,至少一个Z为基团CR12Y;每个Y为CO 2 H,PO 3 H,SO 3 H,CONR 12,CON(OR 1)R 1,CNS或CONR1NR 12; m 是0或1或2;每个n是2或3;当B是(CR1Y)时,q是0或1,当B是N(CR12Y)时,q是2; p是具有至少2的整数;每个R1 可以相同或不同的是氢原子或任选被一个或多个羟基或烷氧基取代的烷基,芳基或芳烷基,或在环原子上或Z基团中的两个R 1基团一起表示连接基团L;每个L 可以相同或不同,表示分子量小于1000的键或有机连接基团及其盐和螯合物,这些化合物,特别是具有顺磁性或重金属离子的二联体三聚体是特别的 作为诊断成像造影剂有效。