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    • 1. 发明授权
    • Free radicals
    • 自由基
    • US5530140A
    • 1996-06-25
    • US220522
    • 1994-03-31
    • Sven AnderssonFinn RadnerAnna RydbeekRolf ServinLars-Goran Wistrand
    • Sven AnderssonFinn RadnerAnna RydbeekRolf ServinLars-Goran Wistrand
    • A61K49/20C07B60/00C07D493/04C07D495/04C07D497/04C07D519/00A61K49/00
    • C07D493/04A61K49/20C07B61/02C07D495/04C07D497/04
    • The invention provides novel persistent free radicals useful in Overhauser MRI being triarylmethyl radicals having as at least one aryl group a group of formula ##STR1## (wherein each X which may be the same or different is an oxygen or sulphur atom or a group CO or S(O).sub.n, (where n is 1 to 3) with the proviso that at least one group X is a sulphur atom or a S(O).sub.n group; R.sup.1 is a hydrogen atom or group of formula --M, --XM, --X--Ar.sup.2, or --Ar.sup.2 where M is a water solubilizing group, and Ar.sup.2 represents a 5-10 membered aromatic ring optionally substituted by a water solubilizing group M; and each of the groups R.sup.7, which may be the same or different, is a hydrogen atom, or a hydrocarbon group or a water solubilizing group M, or two groups R.sup.7 together with the atom to which they are bound represent a carbonyl group or a 5 to 8 membered cycloalkylidene, mono- or di-oxacycloalkylidene, mono- or di-azacycloalkylidene or mono- or di-thiacycloalkylidene group optionally with the ring attachment carbon replaced by a silicon atom, and R.sup.7 where it is other than hydrogen, is optionally substituted by a hydroxyl group, an optionally alkoxylated, optionally hydroxylated acyloxy or alkyl group or a water solubilizing group M)). The novel radicals have good stability, long relaxation times and good relaxivity.
    • 本发明提供了在Overhauser MRI中有用的新型持久性自由基,其具有作为至少一个芳基的基团为具有下式的基团的三芳基甲基(其中可以相同或不同的X是氧或硫原子或 基团CO或S(O)n,(其中n为1至3),条件是至少一个基团X为硫原子或S(O)n基团; R 1为氢原子或式-M ,-XM,-X-Ar2或-Ar2,其中M是水溶性基团,Ar2表示任选被水增溶基团M取代的5-10元芳香环;并且各基团R7可以是 相同或不同的是氢原子,或烃基或水溶性基团M,或两个R 7与它们所连接的原子一起代表羰基或5-8元环亚烷基,单 - 或二 - 单环或二氮杂环亚烷基或任选具有环连接c的单 - 或二 - 芳烃被硅原子取代,并且其中不是氢的R 7任选被羟基取代,任选烷氧基化,任选羟基化的酰氧基或烷基或水溶性基团M))。 新型自由基具有良好的稳定性,较长的松弛时间和良好的松弛性。
    • 3. 发明授权
    • Solution containing a nitroxide radical for magnetometry by nuclear
magnetic resonance
    • 含有核磁共振磁力计的氮氧自由基的溶液
    • US5681753A
    • 1997-10-28
    • US568757
    • 1995-12-07
    • Carole BourbonMehdi Moussavi
    • Carole BourbonMehdi Moussavi
    • C07B60/00G01R33/24G01N24/00G01V3/00
    • C07B61/02G01R33/24Y10T436/24
    • The invention relates to a solution containing a nitroxide radical for magnetometry by nuclear magnetic resonance. This solution is constituted by a nitroxide radical of formula: ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4, which can be the same or different, represent an alkyl group or an alkoxy group which may be deuterated, or in which the pairs R.sup.1 -R.sup.2 and/or R.sup.3 -R.sup.4 together form an optionally deuterated cycloalkyl or polycycloalkyl group, and N represent .sup.14 N or .sup.15 N, dissolved in a solvent having an oxidizing power and an appropriate viscosity. The solvent can be constituted by a mixture of water and two compounds respectively playing the part of the oxidizing agent and viscosity modifying agent, e.g. water, ethylene glycol and NalO.sub.4, or can be solely constituted by a mixture of water and an oxidizing agent able to modify the viscosity, such as acetic acid.
    • 本发明涉及含有用于通过核磁共振进行磁力计的氮氧自由基的溶液。 该溶液由式(I)的氮氧自由基构成,其中可以相同或不同的R 1,R 2,R 3和R 4表示可以被氘化的烷基或烷氧基,或 其中对R1-R2和/或R3-R4一起形成任选的氘代环烷基或多环烷基,N代表14N或15N,溶解在具有氧化能力和适当粘度的溶剂中。 溶剂可以由水和两种化合物的混合物构成,分别在氧化剂和粘度调节剂的一部分中播放。 水,乙二醇和NalO 4,或者可以由水和能够改变粘度的氧化剂的混合物,例如乙酸构成。