sulfuric acid; hydrogen bromide; sodium nitrite in water T=0 - 5°C; 1 h;
参考文献
Gashev, S. B.; Sedova, V. F.; Smirnov, L. D.; Mamaev, V. P.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1983 , vol. 19, # 9 p. 1008 - 1012
Khimiya Geterotsiklicheskikh Soedinenii, 1983 , # 9 p. 1257 - 1261