Synthesis of novel 2-phenyl-2H-pyrazolo[4,3-c]isoquinolin-3-ols: topological comparisons with analogs of 2-phenyl-2,5-dihydropyrazolo[4,3-c]quinolin-3-(3H)-ones at benzodiazepine receptors
作者:Michael S. Allen、Phil Skolnick、James M. Cook
DOI:10.1021/jm00080a024
日期:1992.1
Based on the topology of pyrazoloquinolinones 10-12, a series of 2-phenyl-2H-pyrazolo[4,3-c]isoquinolines 6a-d, 7a-d, 8, and 9 have been synthesized and evaluated for their ability to inhibit radioligand binding to benzodiazepine receptors (BzR). Modification of the hydrogen bonding donor and acceptor characteristics of the NH and C = O functionalities of the pyrazoloquinolinones 10-12 resulted in
根据吡唑并喹啉酮10-12的拓扑结构,合成了一系列2-苯基-2H-吡唑并[4,3-c]异喹啉6a-d,7a-d,8和9,并对其抑制能力进行了评估。放射性配体与苯并二氮杂receptor受体(BzR)结合。吡唑并喹啉酮10-12的NH键和C = O官能团的氢键供体和受体特性的修饰导致配体对BzR的亲和力大大降低(IC50远大于2 microM)。6a-d,7a-d,8和9的低亲和力与具有氢键受体位点(A2)的各种反向激动剂(β-咔啉,二吲哚和吡唑并喹啉酮)上存在的NH功能有关)结合蛋白上。此外,它支持了吡唑并喹啉酮的羰基功能以及具有氢键供体位点(H1)的β-咔啉和二吲哚的吡啶氮原子的参与。最后,这项工作的结果表明,反向激动剂的高亲和力结合需要在BzR的氢键供体(H1)和受体位点(A2)同时相互作用。