A simple and efficient electrochemical method has been developed for highly regioselective synthesis of unsaturated 1, 6-dioic acids from 1, 3-dienes and CO2. The electrosynthesis was successfully carried out by using a nickel cathode and an aluminum anode in an undivided cell containing n-Bu4NBr-DMF electrolyte with a constant current under 3MPa pressure of CO2, and the sole 1, 4-addition products were obtained in good to excellent ...