Ni-Catalyzed Regioselective Hydrocarboxylation of Alkynes with CO₂ by Using Simple Alcohols as Proton Sources

A mild and user-friendly Ni-catalyzed regioselective hydrocarboxylation of alkynes with CO2 (1 bar) is described. This protocol is characterized by a wide scope while obviating the need for sensitive organometallic species and by an unprecedented regioselectivity pattern using simple alcohols as proton sources.