Diastereoselective Synthesis of Enantiomerically Pure 3-Organosulfonyl-2-(2-oxocycloalkyl)-1,3-oxazolidines from 2-Formylcycloalkanones and β-Aminoalkanols - Hoppe, Inga; Hoffmann, Holger; Gärtner, Ingeborg; Krettek, Thomas; Hoppe, Dieter (Synthesis, 1991)