反应条件
1: 82 percent / NaOH / aq. ethanol / r.t., 30min., then reflux, 4h 2: 78 percent / polyphosphoric acid / 1.5 h / 190 - 200 °C 3: 71 percent / Se powder / 8 h / 300 °C View Scheme
参考文献
Tedjamulia, Marvin L.; Tominaga, Yoshinori; Castle, Raymond N.
Journal of Heterocyclic Chemistry, 1983 , vol. 20, p. 1485 - 1495