Synthesis and Structure–Activity Relationships of 5,6,7-Substituted Pyrazolopyrimidines: Discovery of a Novel TSPO PET Ligand for Cancer Imaging
作者:Dewei Tang、Eliot T. McKinley、Matthew R. Hight、Md. Imam Uddin、Joel M. Harp、Allie Fu、Michael L. Nickels、Jason R. Buck、H. Charles Manning
DOI:10.1021/jm4001874
日期:2013.4.25
Focused library synthesis and structure–activity relationship development of 5,6,7-substituted pyrazolopyrimidines led to the discovery of 2-(5,7-diethyl-2-(4-(2-fluoroethoxy)phenyl)pyrazolo[1,5-a]pyrimidin-3-yl)-N,N-diethylacetamide (6b), a novel translocator protein (TSPO) ligand exhibiting a 36-fold enhancement in affinity compared to another pyrazolopyrimidine-based TSPO ligand, 6a (DPA-714). Radiolabeling
5,6,7-取代的吡唑并嘧啶的重点文库合成和构效关系开发导致了2-(5,7-diethyl-2-(4-(2-fluoroethoxy)phenyl)pyrazolo[1,5- a ]嘧啶-3-基) -N , N-二乙基乙酰胺( 6b ),一种新型易位蛋白 (TSPO) 配体,与另一种基于吡唑并嘧啶的 TSPO 配体6a (DPA-714)相比,亲和力提高了 36 倍。用氟-18 ( 18 F) 进行放射性标记促进了 2-(5,7-二乙基-2-(4-(2-[ 18 F] 氟乙氧基)苯基)吡唑并[1,5 - a ]嘧啶-3-基的产生)- N , N - 二乙基乙酰胺( 18F- 6b ) 具有高放射化学产率和比活性。进行了18 F- 6b 的体内研究,该研究表明该试剂是用于表达 TSPO 的癌症的分子成像的改进探针。