1: 54 percent / conc H2SO4 / 2 h 2: polyphosphoric acid / 0.67 h / 120 °C 3: KOH / methanol / 0.67 h / 120 °C View Scheme
参考文献
Nordlander, J. Eric; Catalane, David B.; Kotian, Kirtivan D.; Stevens, Randall M.; Haky, Jerome E.
Journal of Organic Chemistry, 1981 , vol. 46, p. 778 - 782
