Fluorine-Containing Furan Derivatives from the Michael Addition of Ethyl 4,4,4-Trifluoro-3-oxobutanoate with β-Nitrostyrenes - Song, Liping; Li, Xianfu; Xing, Chunhui; Li, Dongmei; Zhu, Shizheng; Deng, Hongmei; Shao, Min (Synlett, 2010)