Nucleophilic addition to the oxy‐allyl cation intermediate has emerged as a promising methodology for functionalization of the α‐position of carbonyl compounds in an umpolung fashion. However, a structure of available carbon nucleophiles to trap the catalytically generated oxy‐allyl cation has been limited to highly nucleophilic ones. Herein, we report the Brønsted acid‐catalyzed α‐arylation of ketones employing less explored phenolic nucleophiles as carbon nucleophiles in the oxy‐allyl cation catalysis, affording ketones bearing an all carbon quaternary center at the α‐position.
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