Synthesis of S-thiomethyl DMSA and S-thiomethyl ECD, radiolabelling with technetium-99m and biological evaluation
作者:Kasturi Sanyal、Mita Chatterjee Debnath
DOI:10.1002/jlcr.2922
日期:2012.6.15
Protection of the thiolate function of dimercaptosuccinic acid (DMSA) and ethylenedi-l-cysteine diethyl ester (ECD) by S-thiomethylation allowed automatic deprotection during technetium-99m (99mTc) radiolabelling by direct reduction with stannous chloride dihydrate. Protection of the free thiolate group increased the stability of the ligands as well as deprotection during complexation, which resulted in the desired radiopharmaceuticals. The complexes obtained from the protected ligands were chromatographically (HPLC) and biologically compared with the corresponding 99mTc complexes of the unprotected ligands. The results suggest that the aforementioned method of protection by S-thiomethylation could be utilized for the development of single-vial DMSA and ECD kit. Copyright © 2012 John Wiley & Sons, Ltd.
通过 S-硫甲基化保护二巯基丁二酸 (DMSA) 和乙二-L-半胱氨酸二乙酯 (ECD) 的硫醇盐功能,允许在锝-99m (99mTc) 放射性标记过程中通过用二水合氯化亚锡直接还原来自动脱保护。游离硫醇基团的保护增加了配体的稳定性以及络合过程中的脱保护,从而产生了所需的放射性药物。从受保护的配体获得的复合物与未受保护的配体的相应 99mTc 复合物进行色谱 (HPLC) 和生物学比较。结果表明,上述S-硫甲基化保护方法可用于单瓶DMSA和ECD试剂盒的开发。版权所有 © 2012 约翰威利父子有限公司