1: in tetrahydrofuran 2: in tetrahydrofuran Acidic conditions;
参考文献
Moorthy, Jarugu Narasimha; Venkatakrishnan, Parthasarathy; Natarajan, Palani; Huang, Duo-Fong; Chow, Tahsin J.
Journal of the American Chemical Society, 2008 , vol. 130, # 51 p. 17320 - 17333