A new, general synthetic route to multidentate N,S ligands for use in technetium-99m radiopharmaceuticals. Preparation of diamido disulfur, diamino dithiol, and tripodal N3S3 prototypes. Comparative biodistributions of [99mTcVO-DADS]- analogs which contain 5,5,5- and 5,7,5-membered chelate ring systems
作者:Danuta Stepniak-Biniakiewicz、Baohe Chen、Edward Deutsch
DOI:10.1021/jm00080a011
日期:1992.1
ligand analogues which contain a 5,7,5-membered chelate ring system are readily synthesized and labeled with 99mTc to form stable complexes. The presence of the 7-membered chelate ring allows for facile introduction of pendant groups into the ligand system, and thus for a ready route to control the biodistribution of the resulting 99mTc radiopharmaceutical. The 99mTc labeling of the DADT analogues derived
已经开发出一种新的,通用的合成路线,可以合成用于99m放射性药物的各种四齿N2S2和六齿N3S3配体。关键反应采用1-(乙氧羰基)-2-乙氧基-1,2-二氢喹啉(EEDQ)将合适的二胺或三胺与S-保护的巯基乙酸偶联。以高收率合成了选定的DADS(二氨基二硫)和DADT(二氨基二硫醇)以及衍生自乙二胺1,2和丁二胺1,4的类似物,以及三脚架N3S3类似物。用99mTc标记源自丁二胺-1,4(DADS-bn)的DADS类似物配体可产生单个放射化学产物或预期数量的立体异构体产物。使用99Tc的FAB MS分析表明,DADS-bn配体与单氧Tc(V)核形成四齿5、7、5元环螯合物系统:[TcO-DAD-bn]-。在大鼠生物分布研究中,DADS-en和DADS-bn复合物显示出非常相似的生物学活性。7元环上的苯基取代基会形成一个99mTc的复合物,该复合物具有增加的亲脂性,增加的肝脏吸收和最小的肝胆管清除率。因此,可以容易地合成含有5