Abstract

1-Azabicyclo[5.3.0]decane-5,10-dione has been prepared and fluorinated using sulfur tetrafluoride at different temperatures. Whereas the carbonyl ketone was fluorinated at room temperature, the amidic CN bond remained essentially untouched even at 160 °C for 24 h. The resulting difluorobicyclic lactam was reduced to the corresponding bicyclic tertiary amine which proved to be more stable than the hydrocarbon analog.

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