trifluoroacetic anhydride in dichloromethane
4 h; Heating;
参考文献
Fedorov, N. V.; Anisimov, A. V.; Viktorova, E. A.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , vol. 25, # 12 p. 1356 - 1359
Khimiya Geterotsiklicheskikh Soedinenii, 1989 , vol. 25, # 12 p. 1629 - 1633