Single pot diastereoselective synthesis of six membered cyclic (E)-endo-aldonitrones via intramolecular cyclization of ω-alkenyl oximes

- β-Lactam-synthon-interceded intramolecular cyclization of ω-alkenyl oximes.
- Convenient access to synthetically arduous cyclic (E)-endo-aldonitrones.
- Reaction with DMAD resulted in tandem 1,3-dipolar cycloaddition-N-O bond cleavage.