Abstract

A highly selective and switchable ruthenium-catalyzed ortho C-H alkylation and C-H alkenylation of benzoic acids with allyl alcohols is reported. A complete switch in selectivity is achieved upon tuning the reactivity of the organometallic intermediate in the carboxylate-directed C-H activation to provide access to highly useful motifs such as 2-alkylbenzoic acids and phthalides.

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