Pyrazoles are organic compounds of the general formula C3H3N2H. It is a five-membered heterocycle consisting of three carbon atoms and two adjacent nitrogen atoms. As an H-bond-donating heterocycle, pyrazole has been used as a more lipophilic and metabolically more stable bioisomer of phenol. Pyrazoles have attracted more and more attention due to their broad spectrum of action and strong efficacy.
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Potent IRAK-4 inhibitors have been reported by several groups including some structurally related benzimidazoles as well as alternative fused heterocycles such as the imidazopyridine and imidazopyridazine. Such compounds are reported to have IRAK-1 and IRAK-4 activity with varying degrees of selectivity.
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