Ytterbium(III) Triflate-Catalyzed Electrophilic Cyclization of Glyoxalate-Derived Unsaturated Imines Qiang Jia, Wenhua Xie, Wei Zhang, Adam Janczuk, Sanzhong Luo, Baolian Zhang, Jin-Pei Cheng, Mohamad B. Ksebati and Peng G. Wang* Tetrahedron Lett. 2002, 43, 2339–2342. |