Spirocyclopropane-and spiroazetidine-substituted tetracycles 13D–E and 16A are described as orally active MK2 inhibitors. The spiroazetidine derivatives are potent MK2 inhibitors with IC50< 3nM and inhibit the release of TNFα (IC50< 0.3 μM) from hPBMCs and hsp27 phosphorylation in anisomycin stimulated THP-1 cells. The spirocyclopropane analogues are less potent against MK2 (IC50= 0.05–0.23 μM), less potent in cells (IC50< 1.1 μM), but ...