反应条件
1: 1) lithium bis(trimethylsilyl)amide / 1) THF, -78 deg C up to r.t., 2 h, 2) THF, a) -78 deg C, 2 h, b) r.t., 6 h 2: 95 percent / N-bromosuccinimide, benzoyl peroxide / CCl4 / 1 h / 80 - 85 °C 3: 2) 40percent aq. KOH / 1) DMSO, THF, 0 deg C, 4 h, 2) r.t., 2 h View Scheme
