1: 62 percent / 10percent NaOH / dimethylsulfoxide / 1 h / Ambient temperature 2: 86 percent / 50percent NaOH / dimethylsulfoxide / 1 h / Ambient temperature 3: 85 percent / K3Fe(CN)6, 50percent NaOH / H2O; benzene / 1 h / Ambient temperature 4: 79 percent / 50percent NaOH / dimethylsulfoxide / 3 h / Ambient temperature View Scheme

1: 62 percent / 10percent NaOH / dimethylsulfoxide / 1 h / Ambient temperature 2: 86 percent / 50percent NaOH / dimethylsulfoxide / 1 h / Ambient temperature 3: 85 percent / K3Fe(CN)6, 50percent NaOH / H2O; benzene / 1 h / Ambient temperature View Scheme

sodium hydroxide in dimethyl sulfoxide 1 h; Ambient temperature;