Synthesis of Axially Chiral Cyclic Amine-Substituted 2-(Oxazolinyl)pyridine Ligands for Catalytic Asymmetric Fluorination of β-Keto Esters - Shibatomi, Kazutaka; Tsuzuki, Yuya; Nakata, Shin-ichi; Sumikawa, Yusuke; Iwasa, Seiji (Synlett, 2007)