Asymmetric Michael Addition of Chiral Lithiated Sulfonates to Nitroalkenes: Diastereo- and Enantioselective Synthesis of α,β-Disubstituted γ-Nitro and β-Alkoxycarbonyl Methyl Sulfonates - Enders, Dieter; Berner, Otto Mathias; Vignola, Nicola; Harnying, Wacharee (Synthesis, 2002)