Accessing polysubstituted oxazolidines, pyrrolidines and imidazolidines by regioselective [3 + 2] annulations of ketenimines with donor-acceptor oxiranes and aziridines

1. Alajarin, M.
2. Bañon, D.
3. Egea, A.
4. Marín-Luna, M.
5. Orenes, R.-A.
6. Vidal, A.