Scheme 2. Substrate scope.a Standard reaction conditions: conjugated ene-yne-ketone (E/Z = 1 : 1, 0.5 mmol), Ph3P+CF2CO2− (2.0 equiv.), and PFTB (10 mol%) in CPME (5.0 mL) at 50 °C under Ar for 12 h. Isolated yields are shown.
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