Synthesis and Pharmacological Evaluation of Pyrroloazepine Derivatives as Potent Antihypertensive Agents with Antiplatelet Aggregation Activity.
作者:Akira MIZUNO、Norio INOMATA、Mikiko MIYA、Tomoe KAMEI、Makoto SHIBATA、Toshio TATSUOKA、Maki YOSHIDA、Chikako TAKIGUCHI、Tomoko MIYAZAKI
DOI:10.1248/cpb.47.246
日期:——
A series of 1-aminoalkyl-pyrrolo[2, 3-c]azepin-8-one derivatives was synthesized and evaluated as α1 adrenergic and serotonin 2 (5-HT2) receptor antagonists, with the aim of finding a novel antihypertensive agent potently exhibiting both activities. Some compounds with a 4-[4-(4-fluorobenzoyl)piperidino]butyl group at the 1-position exhibited both activities, and varied significantly in terms of the substituents at the 4-position of the pyrroloazepine ring. Among the compounds obtained in this study, (E)-1-[4-[4-(4-fluorobenzoyl)piperidino]butyl]-4-hydroxyimino-7-methyl-1, 4, 5, 6, 7, 8-hexahydropyrrolo[2, 3-c]azepin-8-one (15a, SUN9221) displayed potent α1-adrenergic antagonistic activity (pA2=8.89±0.21) and 5-HT2 antagonistic activity (pA2=8.74±0.22) in isolated guinea pig arteries. This compound exhibited antihypertensive activity and a duration of action equivalent to orally administered prazosin or doxazosin, 3 mg/kg, in conscious spontaneously hypertensive rats, as well as potent antiplatelet aggregation activity.
合成了一系列1-氨基烷基吡咯并[2, 3-c]氮杂环辛酮衍生物,并评估其作为α1肾上腺素能和血清素2(5-HT2)受体拮抗剂的活性,旨在寻找一种新型的具有强效双重活性的抗高血压药物。部分在1位具有4-[4-(4-氟苯甲酰基)piperidino]丁基基团的化合物显示了双重活性,并在吡咯氮杂环的4位取代基方面表现出显著差异。在本研究中获得的化合物中,(E)-1-[4-[4-(4-氟苯甲酰基)piperidino]丁基]-4-羟基亚胺-7-甲基-1, 4, 5, 6, 7, 8-六氢吡咯并[2, 3-c]氮杂环辛酮(15a,SUN9221)在离体豚鼠动脉中表现出强效的α1-肾上腺素能拮抗活性(pA2=8.89±0.21)和5-HT2拮抗活性(pA2=8.74±0.22)。这一化合物表现出抗高血压活性,其作用持续时间相当于口服给药的哌唑嗪或多沙唑嗪(3 mg/kg)在清醒自发性高血压大鼠中的效果,同时还具有强效的抗血小板聚集活性。