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

β-Lactam-synthon interceded diastereoselective single pot synthesis of synthetically challenging six-membered cyclic (E)-endo-aldonitrones has been developed via intramolecular cyclization of ω-alkenyl oximes tethered at the C-3 position of 2-azetidinones along with its utilization in 1,3-dipolar cycloaddition reaction with DMAD.