1: 99 percent / KOH / ethanol / 3 h / 20 °C 2: 90 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C 3: 65 percent / dimethyl dioxirane / acetone; CH2Cl2 / 1 h / 0 - 20 °C 4: 95 percent / K2CO3 / acetone / 6 h / Heating 5: 71 percent / I2; pyridine / 8 h / Heating 6: 94 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C 7: 90 percent / dimethyl dioxirane / acetone; CH2Cl2 / 0.33 h / 0 - 20 °C 8: 87 percent / K2CO3 / acetone; CH2Cl2 / 6 h / Heating 9: 80 percent / dimethyl dioxirane / acetone; CH2Cl2 / 0.17 h / 0 - 20 °C 10: 97 percent / K2CO3 / acetone / 1 h / Heating View Scheme

1: 99 percent / KOH / ethanol / 3 h / 20 °C 2: 90 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C 3: 97 percent / K2CO3 / acetone / 2 h / Heating 4: 86 percent / dimethyl dioxirane / acetone; CH2Cl2 / 0.5 h / 0 - 20 °C 5: 96 percent / K2CO3 / acetone / 1 h / Heating View Scheme

1: 99 percent / KOH / ethanol / 3 h / 20 °C 2: 90 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C 3: 97 percent / K2CO3 / acetone / 2 h / Heating 4: 86 percent / dimethyl dioxirane / acetone; CH2Cl2 / 0.5 h / 0 - 20 °C View Scheme

1: 99 percent / KOH / ethanol / 3 h / 20 °C 2: 90 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C 3: 65 percent / dimethyl dioxirane / acetone; CH2Cl2 / 1 h / 0 - 20 °C 4: 95 percent / K2CO3 / acetone / 6 h / Heating 5: 71 percent / I2; pyridine / 8 h / Heating 6: 94 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C View Scheme

1: 99 percent / KOH / ethanol / 3 h / 20 °C 2: 90 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C View Scheme

1: 99 percent / KOH / ethanol / 3 h / 20 °C 2: 90 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C 3: 97 percent / K2CO3 / acetone / 2 h / Heating 4: 86 percent / dimethyl dioxirane / acetone; CH2Cl2 / 0.5 h / 0 - 20 °C 5: 96 percent / K2CO3 / acetone / 1 h / Heating 6: 99 percent / BBr3 / CH2Cl2 / 0.5 h / 0 °C 7: 89 percent / dimethyl dioxirane / acetone; CH2Cl2 / 0.83 h / 0 - 20 °C View Scheme

1.1: AlCl3, aluminium chloride / dichloromethane / 24 h / 0 °C / |Reflux 2.1: sodium hydride / tetrahydrofuran / 0.25 h / 0 °C 2.2: 0.5 h / |Reflux 3.1: sodium hydride / tetrahydrofuran / 1.67 h / 0 °C / |Reflux 4.1: potassium carbonate / acetone / 0.5 h 4.2: 24 h / |Reflux 5.1: sulfuric acid / acetic acid / 0.5 h / 20 °C 6.1: methanol; sodium tetrahydroborate / 0.5 h 7.1: sulfuric acid / 3 h / |Reflux 8.1: ethanethiol; n-butyllithium / N,N,N',N',N'',N''-hexamethylphosphoric triamide / 2 h / 0 - 70 °C / |Inert atmosphere 9.1: sodium hydride / N,N-dimethyl-formamide / 0.17 h / 0 °C 9.2: 2 h / 0 - 20 °C 10.1: ethanethiol; n-butyllithium / N,N,N',N',N'',N''-hexamethylphosphoric triamide / 2 h / 0 - 70 °C / |Inert atmosphere View Scheme

1.1: boron trichloride / dichloromethane / 2 h / 0 °C 1.2: 1 h 2.1: potassium hydroxide / methanol / 80 h / 20 °C 2.2: pH 5 - 6 View Scheme

hydrogenchloride; amalgamated zinc

1: 96 percent / 50 percent aq. KOH / ethanol / 6 h / 20 °C 2: 91 percent / AlCl3 / 10 h / 20 °C 3: 74 percent / I2; pyridine / 8 h / Heating 4: 94 percent / K2CO3 / acetone / 8 h / Heating View Scheme