反应条件
1: 1) n-butyllithium / 1) hexane-ether, -78 deg C, then r.t., 1 h, 2) hexane-ether-dioxane, -78 deg C, then r.t. overnight
2: Zn, conc. aq.NH4OH, CuSO4 / 24 h / Heating
3: 1) ZnCl2, 2) CrO3 / 1) acetic acid, reflux, 3 h, 2) acetic acid, 0.5 h
4: 90 percent / NaBH4 / methanol / 2 h
View Scheme
参考文献
Lopes; Pinto; Costa
Journal of Heterocyclic Chemistry, 1984 , vol. 21, # 2 p. 621 - 622