反应条件
1: 68 percent / MeOH, TsOH / 24 h / Heating
2: 98 percent / TsOH / diethyl ether / 20 h / Ambient temperature
3: 90 percent / Li, DMSO / liquid ammonia / 2 h / -33 °C
4: 1) BuLi / 1) THF, hexane, 20 degC, 10 min, 2) HMPT, 20 degC, 0.5 h
5: 93 percent / Na / diethyl ether; liquid ammonia / -40 °C
6: 95 percent / TsOH / methanol; H2O / 3 h / Heating
View Scheme
