The present invention relates to a class of compounds and to diagnostic compositions containing such compounds where the compounds are iodine containing compounds. More specifically the iodine containing compounds are chemical compounds containing two linked iodinated phenyl groups of the general formula R—N(CO—CH
3
)XN(CO—CH
3
)—R and salts or optical active isomers thereof, wherein X denotes a divalent linking moiety with 5 to 10 bridge elements of carbon, oxygen, sulphur and nitrogen separating the acetylated nitrogen atoms, and which may be further substituted by hydroxyl groups, by C
1
to C
4
alkyl moieties optionally substituted by hydroxyl groups, by C
1
to C
4
alkoxy groups, by amino groups and by C
1
to C
4
alkylamino groups, and wherein 2 or 3 carbon bridge elements together with alkyl or alkoxy groups form a cyclopentane, cyclohexane, pentahydropyran or tetrahydrofuran entity which may be alkyl- or hydroxyalkyl-substituted and each R denotes a triiodinated phenyl residue further substituted by hydrophilic moieties. The invention also relates to the use of such diagnostic compositions as contrast agents in diagnostic imaging and in particular in X-ray imaging, and to contrast media containing such compounds.
Studies on synthesis and activation mechanism of mitomycin dimers connected by 1,2-dithiolane and diol linkers
作者:Hyoung Rae Kim、Jae Jin Kim、Jung Jae Park、Sang Hyup Lee
DOI:10.1016/j.bmc.2012.08.015
日期:2012.10
thiol groups that could serve as probes to activate two mitomycin rings. At first, the target mitomycin 8 was synthesized using mitomycin A (1) and the key intermediate, cyclic disulfide (10), which was prepared through a seven-step synthetic sequence. Diol mitomycin 9 was also synthesized from 1 and diamine salt 13. Next, kinetic studies using solvolysis reaction revealed that the activation rates of
我们报告了新的环状二硫化物丝裂霉素二聚体,7- N,7'- N '-(1“,2”-二硫代丙氨酰-3“,5”-二甲烯基)双丝霉素C(8)的合成和机理研究。二醇丝裂霉素二聚体,7- N,7'- N '-(2“,4”-二羟基-1“,5”-戊二基)双丝霉素C(9)。丝裂霉素8是通过1,2-二硫杂环戊烷(五元环二硫键)接头连接的二聚体,经过专门设计以进行亲核活化和双DNA烷基化,从而有效生产DNA链间交联(DNA ISC)加合物。8中的二硫键裂解会产生两个巯基,可以用作激活两个丝裂霉素环的探针。首先,使用丝裂霉素A(1)和关键中间体环状二硫键(10)合成目标丝裂霉素8,该中间体是通过七步合成序列制备的。二醇丝裂霉素9也由1和二胺盐13合成。接下来,使用溶剂分解反应的动力学研究表明,在Et 3提供的亲核条件下,8的活化速率远高于9和丝裂霉素C(2)的活化速率。P大概是由于在8中存在环状二硫键单元。这些