Synthesis and Histamine H1 Receptor Agonist Activity of a Series of 2-Phenylhistamines, 2-Heteroarylhistamines, and Analogs
作者:Christian Leschke、Sigurd Elz、Monique Garbarg、Walter Schunack
DOI:10.1021/jm00008a007
日期:1995.4
2-phenylhistamines (halogen = Br (35) and I (36)) were equipotent with histamine, while 2-(3-(trifluoromethyl)phenyl)histamine (2-[2-(3-(trifluoromethyl)phenyl)-1H-imidazol-4-yl]ethanamine (39)) was significantly more potent than histamine (39: pD2 = 6.81, relative activity = 128%). The 2-substituted histamine analogues were partial H1 receptor agonists on the endothelium-denuded isolated guinea pig aorta with
分别由合适的酰亚胺或am和乙酸2-氧代-4-邻苯二甲酰亚胺基-1-丁酸酯制备了新的组胺衍生物,其特征是在咪唑环的C2位上有一个(取代的)芳基,杂芳基,苄基或杂芳基甲基取代基(1)。在分离的豚鼠回肠上筛选化合物作为潜在的H1受体激动剂。3-卤代2-苯基组胺(卤素= Br(35)和I(36))与组胺等价,而2-(3-(三氟甲基)苯基)组胺(2- [2-(3-(三氟甲基)苯基)-1H-咪唑-4-基乙乙胺(39)比组胺的效价明显更高(39:pD2 = 6.81,相对活性= 128%)。2-取代的组胺类似物是内皮剥脱的豚鼠主动脉上的部分H1受体激动剂,pEC50值通常小于豚鼠回肠上观察到的,但发现效价等级顺序相似。H1受体拮抗剂美吡拉明可以分别依赖浓度地阻断对豚鼠回肠和主动脉的收缩作用,从而产生美吡拉敏的KB值在纳摩尔范围内。体外化合物35和39与[3H]美吡拉敏标记的豚鼠小脑膜结合,pKi分别为6