in neat (no solvent) T=150°C; 30 h; sealed ampule;
参考文献
Kalcheva, V. B.; Tsvetanska, L. I.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1981 , vol. 17, # 8 p. 756 - 758
Khimiya Geterotsiklicheskikh Soedinenii, 1981 , # 8 p. 1028 - 1030