1: 97 percent / methanolic KOH / 0.5 h / Heating 2: 92 percent / Jones reagent / acetone / 0.17 h / 20 °C View Scheme

1: 97 percent / methanolic KOH / 0.5 h / Heating 2: 92 percent / Jones reagent / acetone / 0.17 h / 20 °C 3: 99 percent / NaOMe / benzene / 2 h / 20 °C 4: 66 percent / NH2OH*HCl / ethanol; H2O / 1 h / Heating 5: 100 percent / NaOMe / methanol; diethyl ether / 0.75 h / 20 °C 6: 92 percent / DDQ / benzene / 0.5 h / Heating 7: 68 percent / LiI / dimethylformamide / 4 h / Heating View Scheme

1: 97 percent / methanolic KOH / 0.5 h / Heating 2: 92 percent / Jones reagent / acetone / 0.17 h / 20 °C 3: 99 percent / NaOMe / benzene / 2 h / 20 °C 4: 66 percent / NH2OH*HCl / ethanol; H2O / 1 h / Heating 5: 100 percent / NaOMe / methanol; diethyl ether / 0.75 h / 20 °C 6: 92 percent / DDQ / benzene / 0.5 h / Heating View Scheme

1: 97 percent / methanolic KOH / 0.5 h / Heating 2: 92 percent / Jones reagent / acetone / 0.17 h / 20 °C 3: 99 percent / NaOMe / benzene / 2 h / 20 °C 4: 66 percent / NH2OH*HCl / ethanol; H2O / 1 h / Heating 5: 100 percent / NaOMe / methanol; diethyl ether / 0.75 h / 20 °C View Scheme

1: 97 percent / methanolic KOH / 0.5 h / Heating 2: 92 percent / Jones reagent / acetone / 0.17 h / 20 °C 3: 99 percent / NaOMe / benzene / 2 h / 20 °C View Scheme

hydrogen bromide; bromine; acetic acid

1: pyridine 2: 30percent H2O2 / acetic acid 3: Br2, HBr / acetic acid View Scheme

1: 30percent H2O2 / acetic acid 2: Br2, HBr / acetic acid View Scheme

1: hydrogen bromide; ethanol 2: diazomethane; diethyl ether View Scheme

pyridine