A Novel Skeletal Rearrangement of 2-Azabicyclo[2.2.1]hept-5-ene-3-carboxylic Acid Derivatives into 2-Oxabicyclo[3.3.0]-oct-7-en-3-ones under Acidic Conditions
Palladium-catalyzed hydroarylations and additional domino reactions of aza- bicyclic and tricyclic norbornene derivatives were investigated and a series of new epibatidine analogues were synthesized.