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Dedicated to Professor Oldřich Paleta on the occasion of his 70th birthday.The radical addition reactions of heptafluoropropyl trifluorovinyl ether (CF 2 =CF-O-C 3 F 7 ) with cyclic ethers such as tetrahydrofuran, tetrahydropyran, 1,4-dioxane and 1,3-dioxolane were investigated to afford the corresponding one to one addition products in fairly high yields in the presence of dibenzoyl peroxide at 60°C. The method provides a facile way to prepare cyclic ethers possessing fluoroalkyl substituents.

Syntheses and radical polymerizations of novel ethylene 2‐trifluoromethylacrylate [(CH2C(CF3)COOCH2CH2OCOC(CF3)CH2] was examined in the presence of 1,4‐dioxane to afford a polymer possessing the molecular weight of as high as 5.6 × 104 possessing 1,4‐dioxane moieties in side chains although radical addition polymerization of 2‐trifluoromethylacrylate hardly takes place. The 5 wt % loss temperature of the polymer was 309 °C determined by thermogravimetric analysis.

The reactivity in radical addition of diethyl carbonate to pentafluoropropen-2-yl benzoate [CF2=C(CF3)OCOC6H5] (BPFP) was investigated to afford the one-to-one addition product by the carbon-carbon bond formation in the presence of dibenzoyl peroxide at 80 °C. The reaction took place predominantly on the methylene group of diethyl carbonate. The mechanism of the hydrogen abstraction from diethyl carbonate followed by the addition to BPFP was proposed. This might be the first example that shows an addition of an organic compound bearing carbonyl group to a polyfluorinated vinyl compound. The method may be a facile way to prepare pentafluoroalkyl-substituted organic compounds by the formation of carbon-carbon bonds with the aid of fluorine atoms. The radical addition reaction of dipropyl carbonate, ethyl methyl carbonate, dibenzyl carbonate and ethylene carbonate to BPFP showed no peaks assignable to addition products by the analysis of reaction systems with GC-MS.