1: 73 percent / NaH / tetrahydrofuran / 3 h / Heating 2: 93 percent / 2M aq. NaOH / 2 h / Heating 3: 38 percent / PhPOCl2 / 1 h / 160 - 170 °C 4: 79 percent / Zn, glacial CH3COOH / 1 h / Heating View Scheme

1: 73 percent / NaH / tetrahydrofuran / 3 h / Heating 2: 93 percent / 2M aq. NaOH / 2 h / Heating View Scheme

1: 73 percent / NaH / tetrahydrofuran / 3 h / Heating 2: 93 percent / 2M aq. NaOH / 2 h / Heating 3: 38 percent / PhPOCl2 / 1 h / 160 - 170 °C View Scheme

1: 73 percent / NaH / tetrahydrofuran / 3 h / Heating 2: 93 percent / 2M aq. NaOH / 2 h / Heating 3: 38 percent / PhPOCl2 / 1 h / 160 - 170 °C 4: 71 percent / methanol / 6 h / Heating View Scheme

1: 73 percent / NaH / tetrahydrofuran / 3 h / Heating 2: 93 percent / 2M aq. NaOH / 2 h / Heating 3: 38 percent / PhPOCl2 / 1 h / 160 - 170 °C 4: 32 percent / Zn, glacial CH3COOH / 48 h / Ambient temperature View Scheme