Structure-affinity relationships of some alkoxycarbonyl-2H-or-4H-pyrimido [2,1-b]benzothiazol-2- or 4-one benzodiazepine receptor ligands
作者:G Trapani、A Carotti、M Franco、A Latrofa、G Genchi、G Liso
DOI:10.1016/0223-5234(93)90074-o
日期:1993.1
Synthesis and ability to displace [H-3]-diazepam binding from rat brain membranes of the 2-alkoxycarbonyl-4H-pyrimido[2,1-b]benzothiazol-4-ones 2a-h and 4-alkoxycarbonyl-2H-pyrimido[2,1-b]benzothiazol-2-ones 3a-n are described. It has been found that, among the prepared compounds, compound 2a is the most active. Structure-affinity relationships for compounds 2, 3 and the previously reported [16] 3-alkoxycarbonyl-4H-pyrimido[2,1-b]benzothiazol-4-ones 1 are discussed. Moreover, theoretical molecular descriptors have been derived for such benzodiazepine receptor (BZR) ligands both from quantum chemical calculations (AM1) and modeling of their molecular structures. An attempt to interpret the obtained results with reference to some BZR pharmacophore models is also reported.