First Diels-Alder Cycloaddition of N′-Oxazolyl-N,N-dimethylalkylamidines with Electron-Poor Dienophiles: Characterization of a Diastereoselective Pathway - Guillon, Jean; Léger, Jean-Michel; Massip, Stéphane; Thé, Corinne; Vidaillac, Céline; Monti, Jean-Pierre; Jarry, Christian (Synlett, 2002)