Oxolane was fluoroalkylated by its photoadditions under atmospheric pressure. Monofluoro- alkylations were carried out with hexafluoropropene (1) and perfluorovinyl ethers C3F7O- [CF (CF3) CF2O] n-CF= CF2 (24, n= 0–2) by direct photoexcitation of the olefins to give high yields of addition products 9–12 (81–94%). The reactions were completely regioselecti ve at the oxolane molecule and almost completely regioselective (93–99%) at the double bond ...