1: 95 percent / K2CO3 / dimethylformamide / 96 h / Ambient temperature 2: 90 percent / CuSO4*5H2O / methanol; H2O / 1 h / Heating 3: 95 percent / NaOMe / methanol / 24 h / Ambient temperature View Scheme

1: 95 percent / K2CO3 / dimethylformamide / 96 h / Ambient temperature 2: 90 percent / CuSO4*5H2O / methanol; H2O / 1 h / Heating View Scheme