Enantioselective Synthesis of exo -4-Nitroprolinates from Nitroalkenes and Azomethine Ylides Catalyzed by Chiral Phosphoramidite·Silver(I) or Copper(II) Complexes

1. Castelló, L.M.
2. Nájera, C.
3. Sansano, J.M.
4. Larrañaga, O.
5. De Cózar, A.
6. Cossío, F.P.