The adrenergic receptors or adrenoceptors are a family of G-protein coupled receptors split into α and β subclasses. The adrenoceptors have important roles in regulating a myriad of physiological conditions and their malfunction has been implicated in the pathophysiology of a number of diseases. Disclosed herein are a series of novel compounds which are ligands of the alpha2-adrenoceptor (α
2
-ARs) subclass of adrenergic receptors. The invention also provides for pharmaceutical compositions comprising the novel compounds. The compounds are suitable for use in the manufacture of medicaments for the treatment of α
2
-ARs associated disorders, such as depression and schizophrenia.
Guanidine and 2-Aminoimidazoline Aromatic Derivatives as α<sub>2</sub>-Adrenoceptor Ligands: Searching for Structure−Activity Relationships
作者:Fernando Rodriguez、Isabel Rozas、Jorge E. Ortega、Amaia M. Erdozain、J. Javier Meana、Luis F. Callado
DOI:10.1021/jm800838r
日期:2009.2.12
In this paper, we report the synthesis of three new 2-aminoimidazoline (compounds 4b, 5b, and 6b) and three new guanidine derivatives (compounds 7b, 8b, and 9b) as potential alpha(2)-adrenoceptor antagonists for the treatment of depression. Their pharmacological profile was evaluated in vitro in human brain tissue and compared to the potential antidepressant 1 and the agonists 2 and 3. All new substrates were evaluated by in vitro functional [S-35]GTP gamma S binding assays in human prefrontal cortex to determine their agonistic or antagonistic activity. Compound 8b was found to be an antagonist in vitro and was subjected to in vivo microdialysis experiments in rats. Moreover, a new synthesis of the precursor amines for compounds 4b-9b is presented.