Structural requirements for agonist actions at the benzodiazepine receptor: studies with analogs of 6-(benzyloxy)-4-(methoxymethyl)-.beta.-carboline-3-carboxylic acid ethyl ester
作者:Sean P. Hollinshead、Mark L. Trudell、Phil Skolnick、James M. Cook
DOI:10.1021/jm00165a028
日期:1990.3
for the pharmacophore of the agonist site (domain) of the BzR, which requires the interaction of two sites of electron density [N(2) and C(4)], a third at E+ (electrostatic or steric), and two of lipophilicity [C(3) and C(6)] of the ligand with the BzR protein (see Figure 1). The pharmacophore for the agonist site is derived from the structure-activity relationships of the benzodiazepines, pyrazoloquinolines
β-咔啉6-(苄氧基)-4-(甲氧基甲基)-β-咔啉-3-羧酸乙酯的类似物2、3、8a-c,9、13和14(ZK-93423,1)为了确定母体化合物1在苯并二氮杂receptor受体(BzR)上表现出的激动剂活性需要合成哪些官能团。在体外和体内评估了这些化合物的效力。β-咔啉2、8a-c和13对BzR表现出高亲和力(0.5-22 nM),但体内研究表明它们不是抗惊厥药,而类似物8a和8b则拮抗地西epa的作用。这些结果与BzR激动剂位点(域)的药效团模型提出的模型一致,该模型要求两个电子密度位点[N(2)和C(4)]相互作用,第三个在E +(静电或空间),BzR蛋白的两个亲脂性[C(3)和C(6)](见图1)。激动剂位点的药效基团衍生自苯并二氮杂,、吡唑并喹啉和β-咔啉1的结构-活性关系,并与配体逆激动剂活性所需的相互作用进行了比较。