Synthesis and structure-activity relationships of 3,5-disubstituted 4,5-dihydro-6H-imidazo[1,5-a][1,4]benzodiazepin-6-ones at diazepam-sensitive and diazepam-insensitive benzodiazepine receptors
作者:Subramaniam Ananthan、Sarah D. Clayton、Steven E. Ealick、Garry Wong、Gary E. Evoniuk、Phil Skolnick
DOI:10.1021/jm00056a008
日期:1993.2
Introduction of chlorine at the 7-position enhances ligand affinity at DS BzR while chlorine at the 8-position decreases affinity (IC50: 11f, 9.3 nM; 11h, 2.4 nM; 11i, 37.8 nM). In contrast, chlorine substitution at the 7- as well as the 8-position increases affinity at DI BzR (Ki: 11f, 112 nM; 11h, 20.2 nM; 11i, 10.9 nM). Compound 11 is among the few described high affinity DI-site ligands with a selectivity
合成了一系列在3和5位具有不同取代基的咪唑并苯并二氮杂6-1,并评估了它们在大鼠皮质和小脑中对地西epa敏感(DS)和对地西epa不敏感(DI)苯并二氮杂(受体(BzR)的亲和力膜。用氨基甲酸酯,乙酰氨基,甲酰基氨基,异硫氰酸根合,2-恶唑啉基,2-苯并恶唑基或对甲苯磺酰基取代3-位的酯取代基会导致DS和DI BzR的亲和力降低> 100倍。用丙基,烯丙基或苯乙基取代5-位氮上的甲基也导致两种BzR同工型的亲和力显着降低。但是,结合苄基会产生在DS BzR上具有中等至高亲和力的配体(11f,h,i和14a-c),提示在受体位点存在疏水口袋。在7位引入氯会增强DS BzR的配体亲和力,而在8位引入氯会降低亲和力(IC50:11f,9.3 nM; 11h,2.4 nM; 11i,37.8 nM)。相反,在7位和8位的氯取代增加了DI BzR的亲和力(Ki:11f,112 nM; 11h,20.2