Cu-promoted single-pot intramolecular esterification of C-3 functionalized azetidin-2-one: an efficient diastereoselective access to azido-/amino-aza-lactones

- Cu-promoted intramolecular amidolysis of C-3 functionalized azetidin-2-ones.
- Diastereoselective access to seven and eight membered aza-lactones.
- Developed approach does not suffer from the drawbacks of conventional routes.