[C:1]1([O:7][C:8](Cl)=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[F-:11].[Na+].C1OCCOCCOCCOCCOC1>C(#N)C>[C:1]1([O:7][C:8]([F:11])=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1To a solution of phenylchloroformate in acetonitrile is charged sodium fluoride. To this mixture is charged the 15-crown-5 (“15C5”) at ambient temperature. The reaction mixture is then heated to 40° C. for approximately 16 hrs. Reaction completion is monitored by gas chromatography (“G.C.”).
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