Pyrroloquinoxaline Derivatives as High-Affinity and Selective 5-HT<sub>3</sub> Receptor Agonists: Synthesis, Further Structure−Activity Relationships, and Biological Studies
作者:Giuseppe Campiani、Elena Morelli、Sandra Gemma、Vito Nacci、Stefania Butini、Michel Hamon、Ettore Novellino、Giovanni Greco、Alfredo Cagnotto、Mara Goegan、Luigi Cervo、Fabio Dalla Valle、Claudia Fracasso、Silvio Caccia、Tiziana Mennini
DOI:10.1021/jm990151g
日期:1999.10.1
[(3)H]zacopride binding. The SAR studies detailed herein delineated a number of structural features required for improving affinity. Some of the ligands were employed as "molecular yardsticks" to probe the spatial dimensions of the lipophilic pockets L1, L2, and L3 in the 5-HT(3) receptor cleft, while the 7-OH pyrroloquinoxaline analogue was designed to investigate hydrogen bonding with a putative receptor site
描述了一系列新型吡咯并喹喔啉和杂芳族相关衍生物的合成,药理评价和构效关系(SAR)。新的吡咯并喹喔啉相关配体在大鼠皮层,表达高密度5-HT(3)受体的组织中以及在NG108-15细胞上进行了测试,并在低纳摩尔或亚纳摩尔范围内表现出IC(50)值,方法是通过抑制[(3)H] zacopride结合。本文详述的SAR研究描述了改善亲和力所需的许多结构特征。一些配体被用作“分子尺度”,以探测5-HT(3)受体裂隙中亲脂性口袋L1,L2和L3的空间尺寸,而7-OH吡咯并喹喔啉类似物被设计用于研究与可能与5-羟色胺羟基相互作用的假定受体位点H1的氢键作用。最活跃的吡咯并喹喔啉衍生物对5-HT(3)受体显示亚纳摩尔亲和力。在功能研究中([[14] C]胍在NG108-15杂化细胞中的体外积累试验),大多数受试化合物均显示出明确的5-HT(3)激动剂特性,而另一些则为部分激动剂。关于5-HT(3)亲和力