1.1: NaH / tetrahydrofuran / 1 h / 20 °C 1.2: 77 percent / aq. NaOH / ethanol / 0.5 h / Heating 2.1: 70 percent / PCl5 / 3 h / Heating 3.1: 80 percent / HCl; H2 / 10 percent Pd/C / methanol / 2 h / 760 Torr View Scheme

1: With sodium hydride in tetrahydrofuran T=20°C; Reduction; 1 h; 2: With sodium hydroxide in ethanol Hydrolysis; 0.5 h; Heating;