1: 12 percent / acetonitrile / 72 h / Ambient temperature 2: NaOMe / methanol / 1-3 h 3: 3.5 h / 130 °C / thermolysis of ylide View Scheme
参考文献
Smith, Richard F.; Soelch, Richard R.; Feltz, Timothy P.; Martinelli, Michael J.; Geer, Susan M.
Journal of Heterocyclic Chemistry, 1981 , vol. 18, p. 319 - 325
