1) pyrolysis, 2) cooling (ice bath), pH up to 4.5; Yield given. Multistep reaction;
参考文献
Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 27, # 5 p. 496 - 501
Khimiya Geterotsiklicheskikh Soedinenii, , vol. 27, # 5 p. 625 - 631