Ethyl 2,4-Dioxo-4-phenylbutyrate: A Versatile Intermediate for the Large-Scale Preparation of Enantiomerically Pure α-Hydroxy and α-Amino Acid Esters - Blaser, Hans-Ulrich; Burkhardt, Stephan; Kirner, Hans Jürg; Mössner, Tanja; Studer, Martin (Synthesis, 2003)