反应条件
1: 91 percent / trifluoroacetic acid; benzene / 5 h / Heating 2: 1.) n-BuLi / 1.) THF, hexane, -5 deg C, 1 h, 2.) THF, hexane, rt, 20 h 3: aq. HCl; tetrahydrofuran; hexane View Scheme
参考文献
Journal of Organic Chemistry, , vol. 62, # 8 p. 2633 - 2635