in N,N-dimethyl-formamide
1)-5 deg C 2) room temperature, 1.5 h; Yield given;
参考文献
Zhilina, O.D.; Shagalov,L. B.; Vasil'ev, A. M.; Suvorov, N. N.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1980 , vol. 16, # 7 p. 735 - 740
Khimiya Geterotsiklicheskikh Soedinenii, 1980 , # 7 p. 949 - 955