Abstract
AbstractA unique intramolecular arylative ring opening of 2‐biaryl substituted donor‐acceptor cyclopropanes in the presence of triflic acid was found, furnishing 9H‐fluorenes and 9,10‐dihydrophenanthrenes. Chemoselectivity between both products is achieved by modification of the solvent, temperature, and amount of triflic acid. Representative large‐scale experiments were also carried out successfully with good outcomes.
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