1: 25 percent / NaOH / H2O; methanol / 16 h / 20 °C 2: 81 percent / Ph3C(+)ClO4(-) / trifluoroacetic acid / 0.25 h / 100 °C 3: 77 percent / NH4OAc / acetic acid / Heating View Scheme

1: 25 percent / NaOH / H2O; methanol / 16 h / 20 °C 2: 81 percent / Ph3C(+)ClO4(-) / trifluoroacetic acid / 0.25 h / 100 °C 3: 77 percent / NH4OAc / acetic acid / Heating View Scheme

1: 81 percent / Ph3C(+)ClO4(-) / trifluoroacetic acid / 0.25 h / 100 °C 2: 77 percent / NH4OAc / acetic acid / Heating View Scheme