Free radical cyclization has emerged as one of the most important reaction types, which is widely used in natural product synthesis, pharmaceutical chemistry, and materials science. This report described the combination of radical cyclization and ruthenium-catalyzed meta-selective C–H functionalization for the synthesis of arylpyrrolidone derivatives. This method exhibited the highly meta-site selectivity
A cationic cobalt(III)‐catalyzeddirectCH amidation of unactivated (hetero)arenes and alkenes by using 1,4,2‐dioxazol‐5‐ones as the amidating reagent has been developed. This transformation proceeds efficiently under external oxidant‐free conditions with a broad substrate scope. Moreover, 6‐arylpurine compounds, which often exhibit high potency in antimycobacterial, cytostatic, and anti‐HCV activities