Electrocarboxylation　of　organic　halides　is　one　of　the　most　investigated　electrochemical　approaches　for　converting　thermodynamically　inert　carbon　dioxide　(CO2)　into　value-added　carboxylic　acids.　By　converting　organic　halides　into　their　sulfone　derivatives,　we　have　developed　a　highly　efficient　electrochemical　desulfonylative　carboxylation　protocol.　Such　a　strategy　takes　advantage　of　CO2　as　the　abundant　C1　building　block　for　the　facile　preparation　of　multifunctionalized　carboxylic　acids,　including　the　nonsteroidal　anti-inflammatory　drug　ibuprofen,　under　mild　reaction　conditions.