1: 87 percent / K2CO3 / dimethylformamide / 0.17 h / 150 - 160 °C 2: 84 percent / KOH / ethanol / 1.5 h / 40 °C 3: thallium (III) nitrate * 3H2O / CHCl3 / 20 h / 30 °C 4: H2 / 10percent Pd/C / methanol 5: 10percent aq. HCl / methanol / 2 h / Heating 6: AlCl3 / acetonitrile / 1.5 h / 25 °C View Scheme

1: pyridine / 2 h / 70 - 80 °C 2: KOH / pyridine / 80 °C 3: 87 percent / conc. H2SO4, acetic acid / 1 h / 50 °C 4: 71 percent / dimethyldioxirane / acetone / 0 °C 5: 96 percent / K2CO3 / acetone / Heating 6: 91 percent / AlCl3 / acetonitrile / 0.5 h / Ambient temperature 7: 90 percent / K2CO3 / methanol / 1.5 h / Heating 8: 90 percent / H2 / 10percent Pd/C / methanol; ethyl acetate / Ambient temperature View Scheme

1: pyridine / 2 h / 70 - 80 °C 2: KOH / pyridine / 80 °C 3: 97 percent / conc. H2SO4, acetic acid / 1 h / 50 °C 4: 56 percent / dimethyldioxirane / acetone / 0 °C 5: 98 percent / K2CO3 / acetone / Heating 6: 85 percent / AlCl3 / acetonitrile / 0.5 h / Ambient temperature 7: 85 percent / K2CO3 / methanol / 1.5 h / Heating 8: 76 percent / H2 / 10percent Pd/C / methanol; ethyl acetate / Ambient temperature View Scheme

1: pyridine / 2 h / 70 - 80 °C 2: KOH / pyridine / 80 °C 3: 90 percent / conc. H2SO4, acetic acid / 1 h / 50 °C 4: 67 percent / dimethyldioxirane / acetone / 0 °C 5: 92 percent / K2CO3 / acetone / Heating 6: 93 percent / AlCl3 / acetonitrile / 0.5 h / Ambient temperature 7: 60 percent / K2CO3 / methanol / 1.5 h / Heating 8: 87 percent / H2 / 10percent Pd/C / methanol; ethyl acetate / Ambient temperature View Scheme

1: pyridine / 2 h / 70 - 80 °C 2: KOH / pyridine / 80 °C 3: 92 percent / conc. H2SO4, acetic acid / 1 h / 50 °C 4: 74 percent / dimethyldioxirane / acetone / 0 °C 5: 85 percent / K2CO3 / acetone / Heating 6: 83 percent / AlCl3 / acetonitrile / 0.5 h / Ambient temperature 7: 88 percent / K2CO3 / methanol / 1.5 h / Heating 8: 89 percent / H2 / 10percent Pd/C / methanol; ethyl acetate / Ambient temperature View Scheme

1: 87 percent / K2CO3 / dimethylformamide / 0.17 h / 150 - 160 °C 2: 80 percent / KOH / ethanol / 1.5 h / 40 °C 3: thallium (III) nitrate * 3H2O / CHCl3 / 20 h 4: H2 / 10percent Pd/C / methanol 5: 10percent aq. HCl / methanol / 2 h / Heating 6: AlCl3 / acetonitrile / 1.5 h / 25 °C View Scheme

1: KOH / ethanol / 2.5 h / 40 - 45 °C 2: SeO2 / pentan-1-ol / 5 h / Heating 3: 31 percent / AlCl3 / acetonitrile / 0.5 h / 20 °C 4: H2 / Pd-C / ethyl acetate; methanol View Scheme

1: 87 percent / K2CO3 / dimethylformamide / 0.17 h / 150 - 160 °C 2: 93 percent / KOH / ethanol / 1.5 h / 40 °C 3: thallium (III) nitrate * 3H2O / CHCl3 / 20 h / 30 °C 4: H2 / 10percent Pd/C / methanol 5: 10percent aq. HCl / methanol / 2 h / Heating 6: AlCl3 / acetonitrile / 1.5 h / 25 °C View Scheme

1: pyridine / 2 h / 70 - 80 °C 2: KOH / pyridine / 80 °C 3: 97 percent / conc. H2SO4, acetic acid / 1 h / 50 °C 4: 70 percent / dimethyldioxirane / acetone / 0 °C 5: 81 percent / K2CO3 / acetone / Heating 6: 97 percent / AlCl3 / acetonitrile / 0.5 h / Ambient temperature 7: 96 percent / K2CO3 / methanol / 1.5 h / Heating 8: 74 percent / H2 / 10percent Pd/C / methanol; ethyl acetate / Ambient temperature View Scheme