反应条件
1: 90.7 percent / pyridine / tetrahydrofuran / 6 h / 0 - 25 °C
2: 53 percent / trifluoroacetic acid / toluene / 1.5 h / 100 - 110 °C
3: 90 percent / xylene / 1.58 h / 120 - 123 °C
4: 69.8 percent / hydrazin hydrate / ethanol / 1) room temp., 2,5 h; 2) 63 deg C, 3 h.
View Scheme
参考文献
Hester Jr.
Journal of Heterocyclic Chemistry, 1980 , vol. 17, # 3 p. 575 - 581
