Aziridine–allylsilane-mediated synthesis of exocyclic γ-amino olefins and azabicyclo[x.y.1]-systems

We have shown that connection of C-2 of an allylsilane to a tethered aziridine ring yields exocyclic γ-amino olefins and desilylated azabicyclo[x.2.1]-systems upon cyclization with BF3·OEt2. Furthermore, manipulation of a specific exocyclic γ-amino olefin provided access to an azabicyclo[3.3.1]nonane. This methodology should be useful for the preparation of natural products and pharmacologically active agents containing these bicyclic heterocyclic systems.