A novel series of pivaloyloxy benzene derivatives has been identified as potent and selective human neutrophil elastase (HNE) inhibitors. Convergent syntheses were developed in order to identify the inhibitors which are intravenously effective in an animal model. A compound of particular interest is the sulfonanilide-containing analogues. Structure-activity relationships are discussed. Structural requirements
Homolytic aromatic substitution is an enabling strategy for areneC–H functionalization with numerous important synthetic applications. However, despite notable advances, exerting control over siteselectivity remains a formidable challenge. Here we report a unified highly site-selective areneC–H amination of various electronically distinct arenes using an iron-aminyl radical. Unlike the conventionally