The title compounds (6-9) were prepared and evaluated for serotonin 5-HT4 agonistic activity in in vitro tests. Introducing a propyl or allyl group at the 3-position of benzamide caused only a slight enhancement of agonistic activity. Construction of the benzo[b]furan skeleton and 2, 3-dihydrobenzo[b]furan skeleton caused a significant enhancement of the activity. 4-Amino-N-[2-(1-azabicyclo[3.3.0]octan-5-yl)ethyl]-5-chloro-2-methylbenzo[b]furan-7-carboxamide (7b) hemifumarate was as potent as cisapride. 4-Amino-N-[2-(1-azabicyclo[3.3.0]octan-5-yl)ethyl]-5-chloro-2, 3-dihydro-2-methylbenzo[b]furan-7-carboxamide (8a) hemifumarate, 4-amino-N-[2-(1-azabicyclo-[3.3.0]octan-5-yl)ethyl]-5-chloro-2, 3-dihydro-2-ethylbenzo[b]furan-7-carboxamide (8c) hemifumarate, and 4-amino-N-[2-(1-azabicyclo[3.3.0]octan-5-yl)ethyl]-5-chloro-2, 3-dihydro-2, 3-dimethylbenzo[b]furan-7-carboxamide (8d) hemifumarate were potent than cisapride. Furthermore, 8a hemifumarate was free from dopamine D1, D2, serotonin 5-HT1, 5-HT2 and muscarine M1, M2 receptor binding activity in the in vitro tests. On the other hand, construction of the indole skeleton caused a remarkable decrease in activity.
标题化合物(6-9)已被合成并在体外测试中评估其对
血清素5-HT4的激动活性。在苯酰胺的3位引入丙基或烯丙基仅导致激动活性的轻微增强。而构建苯并[b]呱骨架和2,3-二氢苯并[b]呱骨架则显著增强了活性。4-
氨基-N-[2-(1-
叠氮环[3.3.0]八烷-5-基)乙基]-5-
氯-2-甲基苯并[b]呱-7-羧酰胺(7b)半
富马酸盐的效力与西沙必利相当。4-
氨基-N-[2-(1-
叠氮环[3.3.0]八烷-5-基)乙基]-5-
氯-2,3-二氢-2-甲基苯并[b]呱-7-羧酰胺(8a)半
富马酸盐,4-
氨基-N-[2-(1-
叠氮环[3.3.0]八烷-5-基)乙基]-5-
氯-2,3-二氢-2-
乙基苯并[b]呱-7-羧酰胺(8c)半
富马酸盐,以及4-
氨基-N-[2-(1-
叠氮环[3.3.0]八烷-5-基)乙基]-5-
氯-2,3-二氢-2,3-二甲基苯并[b]呱-7-羧酰胺(8d)半
富马酸盐的效力均优于西沙必利。此外,8a半
富马酸盐在体外测试中未表现出对
多巴胺D1、D2、
血清素5-HT1、5-HT2及毒蕈碱M1、M2受体的结合活性。另一方面,构建
吲哚骨架则导致活性显著降低。