Metal-Free C-O Bond Functionalization: Catalytic Intramolecular and Intermolecular Benzylation of Arenes
Luis Bering1,2, Kirujan Jeyakumar2, Andrey P Antonchick1,2
1Department of Chemical Biology , Max-Planck-Institute of Molecular Physiology , Otto-Hahn-Straße 11 , 44227 Dortmund , Germany.
Abstract:
A catalytic, metal-free intramolecular rearrangement of benzyl phenyl ethers using nitrosonium salt as a catalyst is described. The optimized reaction conditions enabled a catalytic and metal-free Friedel-Crafts alkylation reaction with benzylic alcohols, producing water as the stoichiometric byproduct. A comprehensive scope (>50 examples) for both approaches and application in drug synthesis were demonstrated. Mechanistic studies suggest a Lewis acid-based mechanism for the metal-free Friedel-Crafts reaction.
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