1: HCl 2: NaOH 3: K2CO3 / KI 4: 4.25 g / LiAlH4 / tetrahydrofuran / 0.5 h 5: 3.9 g / active MnO2 / CHCl3 / 0.5 h / Heating 6: 2.47 g / 50percent aqueous KOH / methanol / 5 h / Heating 7: 1) thallium(III) nitrate / methanol / 1) 1 h, 2) 3 h 8: 190 mg / aqueous HCl / methanol / 4 h / Heating 9: 10 mg / concentrated HCl / acetic acid / 1 h / water-bath View Scheme

1: NaOH 2: K2CO3 / KI 3: 4.25 g / LiAlH4 / tetrahydrofuran / 0.5 h 4: 3.9 g / active MnO2 / CHCl3 / 0.5 h / Heating 5: 2.47 g / 50percent aqueous KOH / methanol / 5 h / Heating 6: 1) thallium(III) nitrate / methanol / 1) 1 h, 2) 3 h 7: 190 mg / aqueous HCl / methanol / 4 h / Heating 8: 10 mg / concentrated HCl / acetic acid / 1 h / water-bath View Scheme

1: K2CO3 / KI 2: 4.25 g / LiAlH4 / tetrahydrofuran / 0.5 h 3: 3.9 g / active MnO2 / CHCl3 / 0.5 h / Heating 4: 2.47 g / 50percent aqueous KOH / methanol / 5 h / Heating 5: 1) thallium(III) nitrate / methanol / 1) 1 h, 2) 3 h 6: 190 mg / aqueous HCl / methanol / 4 h / Heating 7: 10 mg / concentrated HCl / acetic acid / 1 h / water-bath View Scheme

hydrogenchloride in acetic acid 1 h; water-bath;

1: 3.9 g / active MnO2 / CHCl3 / 0.5 h / Heating 2: 2.47 g / 50percent aqueous KOH / methanol / 5 h / Heating 3: 1) thallium(III) nitrate / methanol / 1) 1 h, 2) 3 h 4: 190 mg / aqueous HCl / methanol / 4 h / Heating 5: 10 mg / concentrated HCl / acetic acid / 1 h / water-bath View Scheme

1: 2.47 g / 50percent aqueous KOH / methanol / 5 h / Heating 2: 1) thallium(III) nitrate / methanol / 1) 1 h, 2) 3 h 3: 190 mg / aqueous HCl / methanol / 4 h / Heating 4: 10 mg / concentrated HCl / acetic acid / 1 h / water-bath View Scheme

1: 4.25 g / LiAlH4 / tetrahydrofuran / 0.5 h 2: 3.9 g / active MnO2 / CHCl3 / 0.5 h / Heating 3: 2.47 g / 50percent aqueous KOH / methanol / 5 h / Heating 4: 1) thallium(III) nitrate / methanol / 1) 1 h, 2) 3 h 5: 190 mg / aqueous HCl / methanol / 4 h / Heating 6: 10 mg / concentrated HCl / acetic acid / 1 h / water-bath View Scheme

1: 1) thallium(III) nitrate / methanol / 1) 1 h, 2) 3 h 2: 190 mg / aqueous HCl / methanol / 4 h / Heating 3: 10 mg / concentrated HCl / acetic acid / 1 h / water-bath View Scheme