1: aq. NaOH / dimethylsulfoxide / Ambient temperature 2: K3Fe(CN)6 View Scheme

1: 59 percent / 50percent NaOH / dimethylsulfoxide / 1 h / Ambient temperature 2: 81 percent / K3Fe(CN)6, 50percent NaOH / H2O; benzene / 1 h / Ambient temperature 3: 81 percent / 50percent NaOH / dimethylsulfoxide / 3 h / Ambient temperature View Scheme

1: 73 percent / tetrahydrofuran / 1 h / Ambient temperature 2: 68 percent / KCN / dimethylformamide / 1 h / Heating View Scheme