sulfuric acid in 1,4-dioxane; water 120 h; Ambient temperaturemechanism and product distribution depending on the acidity of the reaction medium of the rearrangement reaction; Mechanism;
Chemistry of Heterocyclic Compounds (New York, NY, United States), , vol. 20, # 10 p. 1177 - 1182
Khimiya Geterotsiklicheskikh Soedinenii, , vol. 20, # 10 p. 1422 - 1427