Synthesis and structure–activity relationships of a series of benzazepine derivatives as 5-HT2C receptor agonists
摘要:
To identify potent and selective 5-HT2C receptor agonists, a series of novel benzazepine derivatives were synthesized, and their structure-activity relationships examined. The compounds were evaluated for their 5-HT2C, 5-HT2A, and 5-HT2B receptor binding affinity and intrinsic activity for the 5-HT2C and 5-HT2A receptors. Among these compounds, 6,7-dichloro-2,3,4,5-tetrahydro-1H-3-benzazepine (6) was effective in a rat penile erection model when administered po, which is a symptom of the serotonin syndrome reflecting 5-HT2C receptor activation. Moreover, compound 6 was characterized as a partial agonist of 5-HT2A receptors; therefore, it had little effect on the cardiovascular system. (C) 2007 Elsevier Ltd. All rights reserved.
Pharmaceutical compositions and methods for producing alpha antagonism
申请人:Smithkline Beckman Corporation
公开号:US04496558A1
公开(公告)日:1985-01-29
Pharmaceutical compositions and methods for producing alpha.sub.2 antagonism utilize, as active ingredients, 6-halo-N-substituted 2,3,4,5-tetrahydro-1H-3-benzazepines. These compositions are particularly useful for lowering intraocular pressure and for the treatment of abnormal cardiovascular conditions such as, for example, congestive heart failure, angina pectoris and thrombosis. The compositions and compounds of this invention, also, produce a reduction in blood pressure in hypertensive subjects and are, therefore, useful as antihypertensive agents.
A pharmaceutical composition for producing alpha2 antagonism comprising a pharmaceutically acceptable carrier and a 3-benzazepine compound of the formula:
in which
R is a lower alkyl having from 1 to 3 carbon atoms or allyl; and
X is halogen; or a pharmaceutically acceptable acid addition salt thereof.
The invention provides a process for preparing a compound of formula (I) and pharmaceutically acceptable salts thereof
where R is lower alkyl of from 1 to 3 carbon atoms or allyl and
X is halogen which comprises cyclising a compound of formula (II):
where R and X are as defined with reference to formula (I) and Y is halogen under Friedel Crafts conditions.
本发明提供了一种制备式(I)化合物及其药学上可接受的盐类的方法
其中 R 为 1 至 3 个碳原子的低级烷基或烯丙基,X 为卤素。
X为卤素,包括环化式(II)化合物:
其中 R 和 X 如式 (I) 所定义,Y 是卤素。