A novel method for the synthesis of esters via reductive coupling of N‐tosylhydrazones with carboxylicacids under metal‐free conditions has been developed. Various functional groups were found to be tolerable under the reaction conditions to afford low to good yields.
on visible-light-mediated Co/Ru dual catalysis. The key feature involves the photochemical oxidation of an organocobalt(III) intermediate derived from hydrogen atom transfer, which is supported by electrochemical analysis, quenching studies, and stoichiometric experiments. This redox process enables the efficient branch-selective alkylation of pharmaceutically important nucleophiles (phenols, sulfonamides