[3 + 2]-Cycloaddition of Nonstabilized Azomethine Ylides. 10. An Efficient Strategy for the Construction of x-Azatricyclo[m.n.0.0a,b]alkanes by Intramolecular Cycloaddition of Cyclic Azomethine Ylide

Various new structural entities related to x-azatricyclo[m.n.0. 0(a)()(,)(b)()]alkanes are constructed by the intramolecular [3 + 2] dipolar cycloaddition of nonstabilized cyclic azomethine ylides. The ylide is generated by the sequential double desilylation of N-alkyl alpha,alpha'-bis(trimethylsilyl)cyclic amines using Ag(I)F as a one-electron oxidant.