1: 82 percent / K2CO3 / dimethylformamide / 96 h / 70 °C 2: 74 percent / KOH; pyridine / bis-(2-hydroxy-ethyl) ether / 4 h / 120 °C 3: 72 percent / pyridine / 20 °C 4: 61 percent / tert-butylimino-tri(pyrrolidino)phosphorane / dioxane / 24 h / 100 °C View Scheme
参考文献
Caldwell, Stuart T.; Petersson, Hanna M.; Farrugia, Louis J.; Mullen, William; Crozier, Alan; Hartley, Richard C.
Tetrahedron, 2006 , vol. 62, # 31 p. 7257 - 7265