Uraguchi, Daisuke Koshimoto, Kyohei Ooi, Takashi Chiral Ammonium Betaines: A Bifunctional Organic Base Catalyst for Asymmetric Mannich-Type Reaction of α-Nitrocarboxylates Chiral Ammonium Betaines: A Bifunctional Organic Base Catalyst for Asymmetric Mannich-Type Reaction of α-Nitrocarboxylates Nitrocarboxylate;Asymmetric;Chiral Ammonium Betaines;Bifunctional Organic Base Catalyst;NitrocarboxylatesChiral 2008-08-20
    https://acs.figshare.com/articles/journal_contribution/Chiral_Ammonium_Betaines_A_Bifunctional_Organic_Base_Catalyst_for_Asymmetric_Mannich_Type_Reaction_of_Nitrocarboxylates/2919886
10.1021/ja8041004.s001