反应条件
1: tetrahydrofuran / Heating 2: 1a) s-BuLi / 1a) THF, cyclohexane, -40 to -25 deg C, 1b) -> -50 deg C, 10 min 2) THF,-> -10 deg C, 20 min 3: trifluoroacetic acid / CH2Cl2 / 0.08 h / Ambient temperature 4: trifluoroacetic acid / CH2Cl2 / 48 h / Ambient temperature View Scheme
