Synthesis and Biological Evaluation of Substituted [<sup>18</sup>F]Imidazo[1,2-<i>a</i>]pyridines and [<sup>18</sup>F]Pyrazolo[1,5-<i>a</i>]pyrimidines for the Study of the Peripheral Benzodiazepine Receptor Using Positron Emission Tomography
作者:Christopher J. R. Fookes、Tien Q. Pham、Filomena Mattner、Ivan Greguric、Christian Loc’h、Xiang Liu、Paula Berghofer、Rachael Shepherd、Marie-Claude Gregoire、Andrew Katsifis
DOI:10.1021/jm7014556
日期:2008.7
The fluoroethoxy and fluoropropoxy substituted 2-(6-chloro-2-phenyl)imidazo[1,2- a]pyridin-3-yl)- N, N-diethylacetamides 8 (PBR102) and 12 (PBR111) and 2-phenyl-5,7-dimethylpyrazolo[1,5- a]pyrimidin-3-yl)- N, N-diethylacetamides 15 (PBR099) and 18 (PBR146) were synthesized and found to have high in vitro affinity and selectivity for the peripheral benzodiazepine receptors (PBRs) when compared with
氟乙氧基和氟丙氧基取代的2-(6-氯-2-苯基)咪唑并[1,2-a]吡啶-3-基)-N,N-二乙基乙酰胺8(PBR102)和12(PBR111)和2-苯基-合成了5,7-二甲基吡唑并[1,5-a]嘧啶-3-基)-N,N-二乙基乙酰胺15(PBR099)和18(PBR146),发现它们对外围苯并二氮杂receptor受体具有很高的体外亲和力和选择性(PBRs)与中央苯二氮杂receptor受体(CBRs)相比。由对甲苯磺酰基前体以50-85%的放射化学收率制备相应的放射性标记化合物[(18)F] 8 [(18)F] 12,[(18)F] 15和[(18)F] 18 。在大鼠的生物分布研究中,[(18)F] PBR化合物的放射性分布与已知的PBR定位平行。在嗅球中 放射性吸收高于大脑其他部位,PK11195和Ro 5-4864能够显着抑制[(18)F] 12,而这些既定的PBR药物对吸收的药理作用很少或没有[(18)F]