Bioorganic and Medicinal Chemistry Letters 2014-Jun
Identification of 2,3-disubstituted pyridines as potent, non-emetic PDE4 inhibitors.
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概要
A series of 2,3-disubstituted pyridines were synthesized as potential non-emetic PDE4 inhibitors. To decrease brain exposure and minimize emesis, we modified the lipophilic moiety of a series of emetic PDE4 inhibitors and found that introduction of a hydroxy group into the pyridine moiety of the side chain led to non-emetic compounds with preserved PDE4 inhibitory activity. Following optimization at the phenoxy group, we identified compound 1 as a potent non-emetic PDE4 inhibitor. Compound 1 showed significant efficacy in an animal model of asthma without inducing emesis.