Highly Efficient Catalytic Enantioselective Mannich Reaction of Malonates with N‐tert‐Butoxycarbonyl Imines by Using Yb(OTf)3/Pybox Catalysts at Room Temperature
1. Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137‐6731 (Iran), Fax: (+98)?241‐415‐3225;2. Institüt für Organische Chemie, RWTH Aachen University, Landoltweg 1, 52074, Aachen (Germany)