反应条件
1: 100 percent / dimethylformamide / 2.5 h / 55 °C
2: 96 percent / 2-methyl-propan-2-ol / 3.5 h / 70 °C
3: 1) lithium diisopropylamide / 1) THF, -30 deg C, 2.5 h, 2) THF, -30 deg C, 2 h, then to O deg C during 1 h
4: 93 percent / H2SO4, acetic anhydride
5: 5.5 g / 20percent NaOH / 40 h / Heating
View Scheme
参考文献
DeJohn; Domagala; Kaltenbronn; Krolls
Journal of Heterocyclic Chemistry, 1983 , vol. 20, # 5 p. 1295 - 1302
