Carbon Dioxide Incorporation into Alkyne Compounds Mediated by Silver Catalysts

We have reported that a silver catalyst with a base was an effective system for the incorporation and utilization of carbon dioxide in organic syntheses under mild reaction conditions. The C≡C triple bond activation by the silver catalysts was assumed to be a key step in these reactions, which was supported by DFT calculations with a model substrate. Based on these reports, we recently developed three new CO 2 incorporations under the mild reaction conditions using our silver catalyst system. In this Personal Account, we describe the silver‐catalyzed CO 2 incorporation with C–C bond formation to afford the corresponding γ‐lactone derivatives and the synthesis of benzoxazin‐2‐one derivatives and 4‐hydroxyquinolin‐2(1 H )‐one derivatives from alkynylanilines with carbon dioxide catalyzed by silver salts.