1: bromine 2: 46 percent Spectr. / MeOH / 5 h / Ambient temperature View Scheme

1: bromine 2: 22 mg / MeOH / 5 h / Ambient temperature View Scheme

1: bromine 2: 120 mg / 30percent methanolic sulphuric acid, MeOH / 0.33 h / Ambient temperature View Scheme

1: CH3COOH / 0.17 h / Heating 2: 43 percent / t-BuOK, O2 / 2-methyl-propan-2-ol; hexane / 0.5 h / 0 °C 3: diethyl ether / 2.5 h / Heating 4: CH3COOH / 0.17 h / Heating 5: 80 percent Spectr. / t-BuOK, O2 / 2-methyl-propan-2-ol; hexane / 0.5 h / 0 °C View Scheme

lithium aluminium tetrahydride in tetrahydrofuran; chlorobenzene 3 h; Heating;