反应条件
1: 66 percent / ZnCl2 / 1) 0 degC, 0.5 h, 2) r.t., 6 h
2: 68 percent / MeOH, TsOH / 24 h / Heating
3: 98 percent / TsOH / diethyl ether / 20 h / Ambient temperature
4: 90 percent / Li, DMSO / liquid ammonia / 2 h / -33 °C
5: 1) BuLi / 1) THF, hexane, 20 degC, 10 min, 2) HMPT, 20 degC, 0.5 h
6: 93 percent / Na / diethyl ether; liquid ammonia / -40 °C
7: 95 percent / TsOH / methanol; H2O / 3 h / Heating
View Scheme
