The present invention generally relates to processes for converting acrylate esters or a derivative thereof to difluoropropionic acid or a derivative thereof. This process is generally performed using fluorine gas in a hydrofluorocarbon solvent. In particular, a process for fluorinating a double bond is disclosed. This process comprises forming a reaction mixture comprising a hydrofluorocarbon solvent, fluorine gas, and a compound of formula 1 wherein R1 is hydroxy, alkoxy, chloro, or —OC(O)CH═CH2 to form a compound of formula 2 in a yield of at least 50% wherein R2 is hydroxy, alkoxy, chloro, —OC(O)CHFCH2F, wherein the hydrofluorocarbon solvent comprises 2H,3H-decafluoropentane and the reaction mixture further comprises a fluorination agent.