Optimization of a series of 2,4-diaminopyridines as neuropeptide Y Y1 receptor antagonists with reduced hERG activity.
2009
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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