Synthesis and in Vitro Evaluation of Iodinated Derivatives of Piperazine as a New Ligand for Sigma Receptor Imaging by Single Photon Emission Computed Tomography
作者:Masahiko Hirata、Tetsuya Mori、Seigo Soga、Takuya Umeda、Yoshiro Ohmomo
DOI:10.1248/cpb.54.470
日期:——
of radioiodinated analogues of 1-[2-(3,4-dimethoxyphenyl)ethyl]-4-(3-phenylpropyl)piperazine (SA4503) was synthesized and evaluated as a potential brain sigma-1 receptor imaging ligands by single photon emission computed tomography (SPECT). Iodinated analogues of SA4503 (4a-c) were prepared from piperazine in a high yield. The in vitro competition binding studies using [3H] DTG (sigma-1, 2), [3H] (+)-pentazocine
合成了一系列新的1- [2-(3,4-二甲氧基苯基)乙基] -4-(3-苯基丙基)哌嗪(SA4503)的放射性碘类似物,并被单光子评估为潜在的脑sigma-1受体成像配体发射计算机断层扫描(SPECT)。从哌嗪以高产率制备SA4503的碘化类似物(4a-c)。在[3H] DTG(sigma-1,2),[3H](+)-喷他佐辛(sigma-1)和[3H] DTG以及carbetapentane(sigma-2)作为sigma的条件下进行体外竞争结合研究受体选择性放射性配体被发现碘化类似物4a-c对sigma受体具有高亲和力(IC50:4a = 7.1、4b = 31.0和4c = 77.3 nM)。特别是,在苯环邻位带有碘的4a的亲和力比SA4503大4.4倍,比氟哌啶醇大3倍。异碘类似物4b与先导化合物SA4503相同。放射性碘化的衍生物[125I] 4a,4b是通过碘脱锡反应以高收率从相