Simple and Efficient Syntheses of N-Glyoxyloyl-7,7-dimethylnorbornane-(1S,2R)-oxazolidinone and Its Thio Derivative - Useful Chirons for Diastereoselective Reactions - Kudyba, Iwona ; Raczko, Jerzy ; Jurczak, Janusz (Synthesis, 2004)