反应条件
1: 76 percent / 90percent H2O2, maleic anhydride / CH2Cl2 / 1) r.t., overnight, 2) reflux, 2 h 2: 1 h / Heating 3: 10percent KOH / methanol / 1 h / Heating 4: POCl3, PCl5 / 1 h / 160 °C 5: 25 percent / 90percent H2O2, maleic anhydride / CHCl3 / 1) r.t., overnight, 2) reflux, 3 h 6: POCl3 / 0.5 h / Heating View Scheme
参考文献
Ohta, Akihiro; Watanabe, Tokuhiro; Akita, Yasuo; Yoshida, Maki; Toda, Suzumi; et al.
Journal of Heterocyclic Chemistry, 1982 , vol. 19, p. 1061 - 1067