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  • Title: Piperidine-containing histamine H3 receptor antagonists of the carbamate series: the alkyl derivatives.
    Author: Lazewska D, Kieć-Kononowicz K, Elz S, Pertz HH, Stark H, Schunack W.
    Journal: Pharmazie; 2005 Jun; 60(6):403-10. PubMed ID: 15997826.
    Abstract:
    A series of N-alkyl urethanes, potential histamine H3 receptor antagonists, was prepared. Carbamate derivatives were synthesized from appropriate isocyanates and N-piperidinoalkan-1-ols. The novel compounds were evaluated for histamine H3 receptor activity in vitro on the guinea pig ileum. Some selected compounds were tested in vivo after p.o. application to mice and in vitro for selectivity towards other histamine receptors (H1, H2) in functional assays in the guinea pig. The most potent H3 receptor antagonist in vitro was compound 14 (pA2 = 7.2). Compound 14 was equipotent at M3 receptors and lacked H3 receptor activity in vivo. Predictions of octanol-water partition coefficient (Pallas) and metabolic fate (MetabolExpert, METEOR) were used to explore potential reasons for this absence of in vivo activity.
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