反应条件
1: 4.84 g / conc. H2SO4 / benzene / Heating 2: 98 percent / NaBH4 / methanol / 1.) 0 deg C, 0.5 h, 2.) room temperature, 1 h 3: 81 percent / KOH / dimethylsulfoxide / Ambient temperature 4: 85 percent / oxalic acid / CH2Cl2; H2O / Ambient temperature View Scheme