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  • Title: N-Alkylated 2-aminotetralins: central dopamine-receptor stimulating activity.
    Author: Hacksell U, Svensson U, Nilsson JL, Hjorth S, Carlsson A, Wikström H, Lindenberg P, Sanchez D.
    Journal: J Med Chem; 1979 Dec; 22(12):1469-75. PubMed ID: 317109.
    Abstract:
    In order to define the structural requirements of N-substituents of 2-aminotetralins as central dopamine receptor agonists, a series of N-alkyl- and N,N-dialkyl-substituted 2-amino-5-hydroxy- and 2-amino-5-methoxytetralins have been synthesized and evaluated. The compounds were tested biochemically and behaviorally for dopaminergic activity. From the biochemical data it is concluded that an n-propyl group on the nitrogen is optimal for activity. The corresponding N-ethyl-substituted compounds are slightly less active, while the absence of N-ethyl or N-propyl groups give almost inactive compounds. It could be demonstrated that this is due to steric and not to lipophilic factors. It is suggested that a possible requirement for a potent agonist is that one of it N substituents must fit into a receptor cavity which, because of its size, can maximally accommodate an n-propyl but also smaller groups like ethyl or methyl. The active compounds appeared to give a similar relative pre- and postsynaptic stimulation and had also similar activities for the limbic system and for striatum. None of the compounds listed seemed to have central noradrenaline- or serotonin-receptor stimulating activity.
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