One-Pot Addition-Intramolecular N-Cyclization of Carbamates Mediated by Alkali Metallic Reagents as an Approach to 4-(Fluoroalkyl)oxazolidin-2-ones - Yang, Xue-Yan; Fang, Xiang; Ju, Zheng-Hua; Hu, Yun-Li; Wu, Fan-Hong (Synthesis, 2011)