trifluoromethylsulfonic anhydride in dichloromethane 24 h; Ambient temperature;
参考文献
Martinez, A. Garcia; Fernandez, A. Herrera; Jimenez, F. Moreno; Fraile, A. Garcia; Subramanian, L. R.; Hanack, M.
Journal of Organic Chemistry, 1992 , vol. 57, # 5 p. 1627 - 1630