1: 70 percent / K2CO3, KI / dimethylformamide / 4 h / 80 °C 2: 88 percent / K2CO3 / dimethylformamide / 7 h / 80 °C 3: NaBH4 / methanol / 1.5 h / 50 °C 4: 4 M HCl / tetrahydrofuran / 2 h / 20 °C View Scheme

1: 88 percent / K2CO3 / dimethylformamide / 7 h / 80 °C 2: NaBH4 / methanol / 1.5 h / 50 °C 3: 4 M HCl / tetrahydrofuran / 2 h / 20 °C View Scheme

1: NaBH4 / methanol / 1.5 h / 50 °C 2: 4 M HCl / tetrahydrofuran / 2 h / 20 °C View Scheme