反应条件
1: 100 percent / PBr3 / diethyl ether / 0.17 h / 0 °C
2: 96 percent / dimethylformamide / 24 h / Ambient temperature
3: 1.) n-BuLi / 1.) THF, hexane, 5 min, -75 deg C; -75 deg C to -45 deg C, 15 min, 2.) -95 deg C, 4 h; -95 deg C to -65 deg C, 1 h
4: 95 percent / Na-Hg / methanol / 4.25 h / 0 °C
5: 88 percent / trifluoroacetic anhydride / 0.25 h
View Scheme
参考文献
Gosselin, P.; Maignan, C.; Rouessac, F.
Synthesis, 1984 , # 10 p. 876 - 881
