反应条件
1: 1) lithium diisopropylamide / 1) THF, hexane, a) -78 deg C, 0.5 h, b) rt, 2.5 h, 2a) -78 deg C, 0.5 h, b) up to rt, 12 h 2: 1) s-BuLi / 1) THF, cyclohexane, a) -70 deg C, 15 min, b) rt, 3.5 h, 2) -70 deg C to rt, 14 h 3: 81 percent / MnO2 / CH2Cl2 / 10 h / Heating 4: 82 percent / N-bromosuccinimide, benzoyl peroxide / CCl4 / 1.5 h / Heating 5: 1) HCO2K, 18-crown-6, 2) Al2O3 / 1) MeCN, 18 h, reflux, 2) CH2Cl2, MeOH, 36 h 6: 51 percent / BF3*Et2O / tetrahydrofuran / 4 h / Heating View Scheme
参考文献
Gribble; Keavy; Davis; Saulnier; Pelcman; Barden; Sibi; Olson; BelBruno
Journal of Organic Chemistry, 1992 , vol. 57, # 22 p. 5878 - 5891
