Journal of Medicinal Chemistry p. 1839 - 1844 (1992)
Update date:2022-08-04
Topics:
Glazer
Koss
Olson
Ricketts
Schaaf
Wiscount Jr.
While fermentation-derived polyether ionophores such as salinomycin are the dominant class of anticoccidial feed additives, there is little information concerning the structural features which confer optimal potency/efficacy in this important series. The recently discovered microbial polyether 1a, featuring potent, broad-spectrum anticoccidial activity, was employed as a template to explore structure-activity relationships. A number of single-step synthetic modifications targeted structural changes in both the lipophilic carbon backbone and the ion-binding cavity of 1a. Although previous semisynthetic transformations among the polyether ionophores almost always resulted in a substantial loss of anticoccidial activity, we obtained several analogues, altered on the periphery of the ionophore-ion complex, which retain good potency and efficacy. Monoglycone 7 (semduramicin sodium) has the most impressive anticoccidial profile of this series, and is undergoing further biological testing under field conditions.
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