Facile Synthesis of Optically Active Trifluoromethylated Compounds: Asymmetric Diels-Alder Reaction of Trifluoromethylated α,β-Unsaturated Sulfonamide under High-Pressure Conditions - Tsuge, Hiroyasu; Nagai, Tomoyuki; Okano, Takashi; Eguchi, Shoji; Kimoto, Hiroshi (Synlett, 1996)