A solution of DEAD (0.261 g, 1.50 mol) in THF (20) was added dropwise to a stirred solution of 4-[5-(5,5,6,6,7,7,8,8,8-nonafluorooctyloxy)-pyrimidin-2-yl]-phenol (0.693 g, 1.50 mmol), trans-3-hepten-1-ol (0.171 g, 1.50 mmol) and triphenylphosphine (0.399 g, 1.50 mmol) in THF (30) and the reaction mixture stirred at room temperature for 16 h. The solvent was removed in vacuo and the residues purified by column chromatography [silica gel, eluted with hexane ethyl acetate (4:1)] to yield a colorless solid, which was recrystallized from ethanol.
