Discovery of new anti-depressants from structurally novel 5-HT3 receptor antagonists: Design, synthesis and pharmacological evaluation of 3-ethoxyquinoxalin-2-carboxamides
作者:Radhakrishnan Mahesh、Thangaraj Devadoss、Dilip Kumar Pandey、Shvetank Bhatt
DOI:10.1016/j.bmcl.2010.12.064
日期:2011.2
A novel series of 3-ethoxyquinoxalin-2-carboxamides were designed as per the pharmacophoric requirements of 5-HT3 receptor antagonist using ligand-based approach. The desired carboxamides were synthesized from the key intermediate, 3-ethoxyquinoxalin-2-carboxylic acid by coupling with appropriate amines in the presence of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC·HCl) and 1-
根据5-HT 3受体拮抗剂的药理学要求,使用基于配体的方法设计了一系列新的3-乙氧基喹喔啉-2-羧酰胺。在1-(3-二甲基氨基丙基)-3-乙基碳二亚胺盐酸盐(EDC·HCl)和1-羟基苯并三唑(HOBt)存在下,通过与适当的胺偶联,由关键中间体3-乙氧基喹喔啉-2-羧酸合成所需的羧酰胺)。在豚鼠回肠纵向肌肉肌层神经丛制备物中,针对5-HT 3激动剂2-甲基-5-HT评估了5-HT 3受体拮抗作用,该激动剂以p A 2值的形式表达。化合物6h发现(3-乙氧基喹喔啉-2-基)(4-甲基哌嗪-1-基)甲酮是活性最高的化合物,其p A 2值为7.7。在强制游泳试验中,与赋形剂处理组相比,具有较高p A 2值的化合物表现出良好的抗抑郁样活性,而具有较低p A 2值的化合物没有表现出活性。