Electrochemistry-Enabled Rh-Catalyzed Regioselective [4+1] and [4+2] Cycloaddition of Benzoic Acid with Alkynyl Esters/Amides

A Rh(III)-catalyzed additive-controlled regioselective [4+1] and [4+2] cyclization of benzoic acids with alkynyl esters/amides under the electrochemical conditions has been developed for the synthesis of phthalides and isocoumarins. The selectivity...