A novel series of 4-amino-N-[2-(1-aminocycloalkan-1-yl)ethyl]-5-chloro-2-methoxybenzamide derivatives (1), which had amines conformationally restricted due to the effect of repulsion by neighboring substituents, were prepared and evaluated for 5-hydroxytryptamine 4 (5-HT4) agonistic activities by using the contraction of longitudinal muscle myenteric plexus (LMMP) of guinea pig ileum. One of the most potent compounds in this series was 4-amino-5-chloro-N-[2-(1-dimethylamino-1-cyclohexyl)ethyl]-2-methoxybenzamide (1c, YM-47813) with an EC<50> value of 1.0 μM on LMMP. This compound effectively enhanced gastric motility and gastric emptying in conscious dogs by oral administration (1-3 mg/kg).
设计合成了一系列具有邻位基团排斥效应使胺基构象受限的4-
氨基-N-[2-(1-
氨基环烷基-1-基)乙基]-5-
氯-2-
甲氧基苯甲酰胺衍
生物(1),并采用豚鼠回肠纵肌肠神经丛(LMMP)收缩的方法评价了其5-羟
色胺4(5-HT4)激动活性。其中活性最高的是化合物4-
氨基-5-
氯-N-[2-(1-
二甲氨基-1-环己基)乙基]-2-
甲氧基苯甲酰胺(1c,Y
M-47813),该化合物对LMMP的
EC50值为1.0 μM。经口给予麻醉犬(1-3 mg/kg),该化合物能显著增强胃动力和胃排空。