Abstract
Silylium ions facilitate the catalytic direct cross-coupling of aryl fluorides with simple arenes and alkanes. This C–H arylation approach is initiated by silylium ion-mediated fluoride abstraction, followed by Friedel–Crafts or C–H insertion reactions of the resulting phenyl cation equivalents. An ortho-silyl group in the fluoroarene substrate is the key for selective intermolecular transformations, stabilizing the aryl cation intermediate and serving as an internal silylium ion precursor.
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