Synthesis and Structure-Activity Relationships of 4-Amino-5-chloro-N-(1,4-dialkylhexahydro-1,4-diazepin-6-yl)-2-methoxybenzamide Derivatives, Novel and Potent Serotonin 5-HT3 and Dopamine D2 Receptors Dual Antagonist.
作者:Yoshimi Hirokawa、Hiroshi Harada、Takashi Yoshikawa、Naoyuki Yoshida、Shiro Kato
DOI:10.1248/cpb.50.941
日期:——
affinity along with a potent 5-HT3 receptor binding affinity. Among the compounds, 5-chloro-N-(1-ethyl-4-methylhexahydro-1,4-diazepin-6-yl)-2-methoxy-4-methylaminobenzamide (82), 5-bromo (110), and 5-iodo (112) analogues exhibited a much higher affinity for the dopamine D2 receptor than that of metoclopramide (IC50=17.5-61.0 nM vs. 483 nM). In particular, 82 showed a potent antagonistic activity for both
为了寻找作为潜在的广泛止吐药的多巴胺D2和5-羟色胺5-HT3受体双重拮抗剂,从4-氨基-5-氯-2-甲氧基苯甲酸衍生物和6-氨基-1,4-制备了许多苯甲酰胺。分别使用大鼠脑突触膜和大鼠皮质膜评估二烷基六氢-1,4-二氮杂卓对多巴胺D2和5-羟色胺5-HT3受体的结合亲和力。从多巴胺D2受体的体外受体结合和体内生物学分析结果中,选择1-乙基-4-甲基六氢-1,4-二氮杂环作为最佳胺部分。在氮原子上的4-氨基-5-氯-2-甲氧基苯甲酰基基团的4-位引入一个甲基和/或在5-位取代基的修饰引起多巴胺D2受体结合的显着增加亲和力以及有效的5-HT3受体结合亲和力。在这些化合物中,5-氯-N-(1-乙基-4-甲基六氢-1,4-二氮杂-6-基)-2-甲氧基-4-甲基氨基苯甲酰胺(82),5-溴(110)和5 -碘(112)类似物对多巴胺D2受体的亲和力比对甲氧氯普胺的亲和力要高得多(IC50 = 17