(i) aq. HBr, aq. EtOH, (ii) POCl3; Multistep reaction;
参考文献
Mazur,I.A.; Kochergin,P.M.
Chemistry of Heterocyclic Compounds (New York, NY, United States), 1970 , vol. 6, p. 470 - 473
Khimiya Geterotsiklicheskikh Soedinenii, 1970 , vol. 6, p. 508 - 511