反应条件
1: 72 percent / toluene-p-sulphonic acid / toluene / 24 h / Heating
2: 2.) 30percent sodium hydroxide / 1.) toluene, reflux, 2 d; 2.) water, reflux 2h
3: 70 percent / butyl-lithium / tetrahydrofuran / 1.) 0 degC, 15 min, 2.) -78 degC to R. T.
4: 84 percent / 50percent sodium hydride / dimethylformamide / 1 h / 50 °C
View Scheme
参考文献
Cornish, Christopher A.; Warren, Stuart
Tetrahedron Letters, 1983 , vol. 24, # 25 p. 2603 - 2606
