AbstractAttempts to photopolymerize 1:1 mixtures of furan and aromatic diketones of the benzophenone type by irradiation of benzene solutions at 350 nm were unsuccessful. An alternative route via furan‐diketone 2:1 adducts was more successful but was complicated by the intervention of hydrogen abstraction reactions in competition with oxetane formation, leading to crosslinking and insolubilization in some case