1: toluene / 0.25 h / Ambient temperature 2: toluene / 0.5 h / Ambient temperature 3: toluene / 3 h / 160 °C 4: 40 percent / aq. LiOH / tetrahydrofuran / 12 h / Ambient temperature 5: 62 percent / diphenyl ether / 24 h / 180 °C 6: 50 percent / Ag2O, HNO3 / dioxane / 0.25 h / Ambient temperature View Scheme