Orally active indole N-oxide PDE4 inhibitors

Article abstract of DOI:10.1016/S0960-894X(98)00572-1

This communication describes the synthesis and in vitro and in vivo evaluation of a novel potent series of phosphodiesterase type (IV) (PDE4) inhibitors. Several of the compounds presented possess low nanomolar IC₅₀'s for PDE4 inhibition and excellent in vivo activity for inhibition of TNF-α levels in LPS challenged mice (mouse endotoxemia model). Emesis studies (dog) and efficacy in a SCW arthritis model for the most potent PDE4 inhibitors are presented.