Regio- and Enantioselective Alkylation of a N-Protected Pyrrolidin-3-one Using Enders’ Chiral Hydrazone Method: A Key Step Towards a New Asymmetric Total Synthesis of (-)-Quinocarcin and Related Analogues - Schneider, Uwe; Pannecoucke, Xavier; Quirion, Jean-Charles (Synlett, 2002)