反应条件
1: 85 percent / TsOH*H2O / benzene / 43 h / Heating; azeotropic removal of water 2: 1.) n-BuLi / 1.) THF, HMPA, -78 deg C, 2.) -78 deg C 3: oxalic acid / CH2Cl2; H2O / 3 h / Ambient temperature View Scheme
参考文献
Journal of Organic Chemistry, , vol. 47, # 10 p. 1855 - 1869