This chlorohydrin was converted in situ to (R)-1,2-epoxy-7-octene and reacted with 2-(2-(2-(trifluoromethoxy(tetrafluoroethoxy)tetrafluoroethoxy)-2,2-difluoroethanol using the following procedure: (R)-8-chloro-7-hydroxy-oct-1-ene (100 g, 0.61 mol), aqueous potassium hydroxide (45 mL of 45 wt. %), 2-(2-(2-(trifluoromethoxy(tetrafluoroethoxy)tetrafluoroethoxy)-2,2-difluoroethanol (291 g, 0.733 mol), Adogen™ 464 (60 g), and 1,2-dimethoxyethane (60 mL) were added to a one liter flask fitted with a mechanical stirrer, an addition funnel, a reflux condenser, and a thermometer. The resulting solution was stirred for one hour at 45° C. and then warmed to 60° C., at which time aqueous potassium hydroxide (70 mL of 45 wt %) was added dropwise. This solution was heated for 2 hours at 60° C. and then at 70° C. for 8 hours. Water (300 mL) was added, and the resulting organic phase was separated and washed with 7 weight % HCl (300 mL). The organic phase was again separated and was concentrated under reduced pressure (25 torr). The resulting crude product was then purified by silica gel chromatography using toluene as eluent to give 268 g of (R)-8-(2-(2-(2-(trifluoromethoxy(tetrafluoroethoxy)tetrafluoroethoxy)-2,2-difluoroethoxy)-7-hydroxyoct-1-ene.
