1: 86 percent / silver benzoate, Et3N / 1 h / Heating 2: 55 percent / AcOH, perchloric acid (3 drops) / 0.25 h / Ambient temperature 3: NaH / tetrahydrofuran / 2 h / Ambient temperature 4: tetrahydrofuran / 0.5 h 5: 27 percent / ethanol / 1 h / Irradiation 6: 9 percent / KOH (40percent) / ethanol; dioxane / 2.5 h / Heating 7: 65 percent / potassium dichromate / dioxane; acetic acid / 5 h / Ambient temperature 8: 28 percent / MnO2, H2SO4 (conc.) / 0.5 h / 60 °C 9: silver oxide / dioxane / 1.5 h / Ambient temperature View Scheme

1: tetrahydrofuran / 0.5 h 2: 27 percent / ethanol / 1 h / Irradiation 3: 9 percent / KOH (40percent) / ethanol; dioxane / 2.5 h / Heating 4: 65 percent / potassium dichromate / dioxane; acetic acid / 5 h / Ambient temperature 5: 28 percent / MnO2, H2SO4 (conc.) / 0.5 h / 60 °C 6: silver oxide / dioxane / 1.5 h / Ambient temperature View Scheme

1: NaH / tetrahydrofuran / 2 h / Ambient temperature 2: tetrahydrofuran / 0.5 h 3: 27 percent / ethanol / 1 h / Irradiation 4: 9 percent / KOH (40percent) / ethanol; dioxane / 2.5 h / Heating 5: 65 percent / potassium dichromate / dioxane; acetic acid / 5 h / Ambient temperature 6: 28 percent / MnO2, H2SO4 (conc.) / 0.5 h / 60 °C 7: silver oxide / dioxane / 1.5 h / Ambient temperature View Scheme

1: 28 percent / MnO2, H2SO4 (conc.) / 0.5 h / 60 °C 2: silver oxide / dioxane / 1.5 h / Ambient temperature View Scheme

1: 1.) Buli, 2.) K2CO3 / 1.) THF, -78 deg C, addition 5 min, then 10 min, to room t., 2.) acetone, 16 h, reflux 2: 1.) TFAA / 2.) CH2Cl2, room t., 90 h; addition at 0, 6 and 48 h 3: 70 percent / silver(II)oxide / dioxane / Ambient temperature 4: 65 percent / BCl3(7 mol equiv) / CH2Cl2 / 3 h / 0 °C / then to room t. 5: 74 percent / nitrobenzene / 2 h / 200 °C View Scheme

1: 1.) TFAA / 2.) CH2Cl2, room t., 90 h; addition at 0, 6 and 48 h 2: 70 percent / silver(II)oxide / dioxane / Ambient temperature 3: 65 percent / BCl3(7 mol equiv) / CH2Cl2 / 3 h / 0 °C / then to room t. 4: 74 percent / nitrobenzene / 2 h / 200 °C View Scheme

1: 65 percent / BCl3(7 mol equiv) / CH2Cl2 / 3 h / 0 °C / then to room t. 2: 74 percent / nitrobenzene / 2 h / 200 °C View Scheme

1: 70 percent / silver(II)oxide / dioxane / Ambient temperature 2: 65 percent / BCl3(7 mol equiv) / CH2Cl2 / 3 h / 0 °C / then to room t. 3: 74 percent / nitrobenzene / 2 h / 200 °C View Scheme

silver(l) oxide in 1,4-dioxane 1.5 h; Ambient temperature;