1: 78 percent / K2CO3, KI / dimethylformamide / 20 h / 80 °C 2: 90 percent / K2CO3 / dimethylformamide / 46 h / 80 °C 3: NaBH4 / methanol / 3 h / 40 °C 4: 4 M HCl / tetrahydrofuran / 3 h / 20 °C View Scheme

1: 90 percent / K2CO3 / dimethylformamide / 46 h / 80 °C 2: NaBH4 / methanol / 3 h / 40 °C 3: 4 M HCl / tetrahydrofuran / 3 h / 20 °C View Scheme

1: NaBH4 / methanol / 3 h / 40 °C 2: 4 M HCl / tetrahydrofuran / 3 h / 20 °C View Scheme