1-bromo-1,1,2,2-tetrafluorobutane

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In the second step, a solution of 3-oxo-4,10-oxa-tricyclo[5,2,1,02,6]nonan-(8)9-ol (21.3 g, 125.0 mmol) in 200 mL acetonitrile was added to the 5-bromo-4,4,5,5-tetrafluoropentanoyl chloride solution. To the mixture was added 9.93 g (125.5 mmol) pyridine and the reaction was stirred at ambient temperature under nitrogen for 16 h. The solvent was removed under reduced pressure and the resulting oily residue was dissolved in 250 mL dichloromethane. The later solution was washed once with 200 mL 1 N HCl, washed once with 200 mL saturated aqueous NaHCO3, dried over MgSO4 and the solvent removed under reduced pressure to produce 3-oxo-4,10-oxa-tricyclo[5,2,1,02,6]nonan-(8)9-oxycarbonyl]-4-bromo-3,3,4,4-tetrafluorobutane as a white solid. The solvent was removed under reduced pressure the resulting oily residue was dissolved in 250 mL dichloromethane The later solution was washed once with 200 mL 1 N HCl washed once with 200 mL saturated aqueous NaHCO3 dried over MgSO4 the solvent removed under reduced pressure