The High Stereoselectivity of the Tandem Sequence Diels-Alder Reaction/Ireland-Claisen Rearrangement Starting from Substituted O-(E)-Buta-1,3-dienyl Ketene Acetals and Cyclic Dienophiles - Soldermann, Nicolas; Velker, Jörg; Neels, Antonia; Stoeckli-Evans, Helen; Neier, Reinhard (Synthesis, 2007)