Visible-Light-Mediated\nNi-Catalyzed Gas-Free Carboxylation:\nStereodivergent Synthesis of <i>E</i>- and <i>Z</i>‑Acrylic Acids

Stereodivergent syntheses of different scaffolds from\nidentical\nstarting materials by switching the fewest parameters are among the\nmost appealing synthetic technologies. Herein, a visible-light mediated\nNi-catalyzed carboxylation of vinyl halides with formates has been\ndeveloped, affording acrylic acids in both <i>Z</i>- and <i>E</i>-configurations from identical vinyl halides. The reaction\nfeatures Ni-catalyzed gas-free carboxylation of vinyl halides by utilizing\nformates as a surrogate of carbon dioxide.