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  • Title: Optimization of a series of 2,4-diaminopyridines as neuropeptide Y Y1 receptor antagonists with reduced hERG activity.
    Author: Kameda M, Kobayashi K, Ito H, Miyazoe H, Tsujino T, Nakama C, Kawamoto H, Ando M, Ito S, Suzuki T, Kanno T, Tanaka T, Tahara Y, Tani T, Tanaka S, Tokita S, Sato N.
    Journal: Bioorg Med Chem Lett; 2009 Aug 01; 19(15):4325-9. PubMed ID: 19487123.
    Abstract:
    The synthesis and evaluation of a series of 2,4-diaminopyridine-based neuropeptide Y Y1 (NPY Y1) receptor antagonists are described. Compound 1 was previously reported by our laboratory to be a potent and selective Y1 antagonist; however, 1 was also found to have potent hERG inhibitory activity. The main focus of this communication is structure-activity relationship development aimed at eliminating the hERG activity of 1. This resulted in the identification of compound 3d as a potent and selective NPY Y1 antagonist with reduced hERG liability.
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