Construction of quaternary stereogenic centers via [2 + 2] cycloaddition reactions. Synthesis of homochiral 4,4-disubstituted 2-azetidinones and imine substituent effects on β-lactam formation

1. Palomo, C.
2. Aizpurua, J.M.
3. García, J.M.
4. Galarza, R.
5. Legido, M.
6. Urchegui, R.
7. Román, P.
8. Luque, A.
9. Server-Carrió, J.
10. Linden, A.