Radioiodinated (+)-4-[(αR)-α-[(2S5R)-4-(iodopropen-2-yl)-2,5-dimethyl-1-piperazinyl]-3-hydroxybenzyl]-N,N-diethylbenzamide: a potential ligand for in vitro and in vivo investigations of δ-opioid receptors
作者:Rikki N. Waterhouse、Michael J. Campa、Jason Park、Edward F. Patz
DOI:10.1002/(sici)1099-1344(1998090)41:9<801::aid-jlcr130>3.0.co;2-c
日期:1998.9
(+)-4-(alpha R)-alpha-[(2S, 5R)-4-(Iodopropen-2-yl)-2,5-dimethyl-1-piperazinyl]-3-hydroxybenzyl]-N, N-diethylbenzamide ((1) under bar), a novel radioiodinated derivative of the selective delta-opioid antagonist (+)-BW373U86, was synthesized and evaluated in vitro for binding to opioid receptor subtypes. This new compound was found to have high affinity (Ki = 0.57 +/- 0.10 nM) and good selectivity for delta (delta) opioid receptors over mu (mu) (Ki mu/delta = 13.6) and kappa (kappa) (Ki kappa/delta = 175) receptors. The corresponding I-123 and I-125 derivatives were prepared by oxidative radioiododestannylation from a trans-vinyltributyltin precursor. The radiochemical yield was 72-78% EOS (74.3 +/- 2.6%, n = 3) for I-125-(1) under bar and 40-62% EOS (53.9 +/- 9.8%, n = 3) for I-123-(1) under bar. The specific activities were 200-300 mCi/mu mol and >5,000 mCi/mu mol for the I-125 and I-123-labeled tracers, respectively.
一种新型的放射性碘化衍生物 (+)-4-(αR)-α-[(2S,5R)-4-(碘丙烯-2-基)-2,5-二甲基-1-哌嗪基]-3-羟基苯甲基]-N,N-二乙基苯甲酰胺 ((1) 下划线),作为选择性δ阿片拮抗剂 (+)-BW373U86 的衍生物,已被合成并对阿片受体亚型的结合进行了体外评估。该新化合物显示出对 δ 阿片受体的高度亲和力(Ki = 0.57 ± 0.10 nM)以及良好的选择性,相对于 μ 阿片受体(Ki μ/δ = 13.6)和 κ 阿片受体(Ki κ/δ = 175)。相应的 I-123 和 I-125 衍生物通过从 trans-乙烯基三丁基锡前体进行氧化放射碘化脱烷基得到。I-125-(1) 下划线的放射化学产率为 72-78% EOS(74.3 ± 2.6%,n=3),I-123-(1) 下划线的产率为 40-62% EOS(53.9 ± 9.8%,n=3)。I-125 和 I-123 标记的示踪剂的比活度分别为 200-300 mCi/μmol 和 >5,000 mCi/μmol。