Hexafluoro-2-Propanol-Promoted Electro-Oxidative [3+2] Annulation of 1,3-Dicarbonyl Compounds and Alkenes

: A straightforward and atom-economical approach to the synthesis of dihydrofurans employing electro-oxidative [3+2] annulation of 1,3-dicarbonyl compound and alkenes has been developed. Neither metal catalysts nor chemical oxidants are required to promote the dehydrogenation process. Moreover, the use of base to decrease the oxidative potential and 1,1,1,3,3,3-hexafluoro-2-propanol to stabilize the reactive intermediates are key to the success of the cyclization.