1: 83 percent / K2CO3 / dimethylformamide / 3.5 h / Ambient temperature 2: 69 percent / 70percent HClO4, H2 / 10percent Pd-C / methanol; H2O / 10 h / 60 °C View Scheme

1: 83 percent / K2CO3 / dimethylformamide / 3.5 h / Ambient temperature 2: 100 percent / POCl3 / 1.5 h / Ambient temperature 3: 100 percent / NaBH4 / methanol / 0.5 h / Ambient temperature 4: 50 percent / H2 / 10percent Pd-C / ethanol / 19 h / 50 °C View Scheme

hydrogen; palladium on activated charcoal Multistep reaction;

sodium hydroxide in water 0.5 h; Heating;