Scheme 1.

Structure of the p38α inhibiting alkynylimidazole 1, which forms covalently adduct p38α, and the proposed aza-Bergman rearrangement of 1 to afford diradical and carbene intermediates

Structure of the p38α inhibiting alkynylimidazole 1, which forms covalently adduct p38α, and the proposed aza-Bergman rearrangement of 1 to afford diradical and carbene intermediates