1: 98 percent / HF; pyridine / acetonitrile / 1 h / 20 °C 2: 80 percent / N-bromosuccinimide; triphenylphosphine / CH2Cl2 3: 52 percent / CuI / tetrahydrofuran / -26 °C 4: 89 percent / aq. HCl / methanol / 44 h / 20 °C View Scheme

1: diethylaluminium chloride / hexane / 2 h / 20 °C / Inert atmosphere 2: boron tribromide / dichloromethane / 0.42 h / 20 °C / Inert atmosphere View Scheme

1.1: osmium(VIII) oxide; 4-methylmorpholine N-oxide / water; acetone; tert-butyl alcohol / 24 h / 20 °C / Inert atmosphere 2.1: dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct; sodium carbonate / ethylene glycol dimethyl ether; water / 18 h / 80 °C / Inert atmosphere 3.1: triethylamine / dichloromethane / 0.5 h / Inert atmosphere; Cooling with ice 3.2: 2.08 h / 20 °C / Inert atmosphere 3.3: 18 h / 140 °C / Inert atmosphere 4.1: sodium iodide; zinc / N,N-dimethyl-formamide / 18 h / 140 °C / Inert atmosphere 5.1: potassium carbonate / acetone / 20 °C / Inert atmosphere 6.1: diethylaluminium chloride / hexane / 2 h / 20 °C / Inert atmosphere 7.1: boron tribromide / dichloromethane / 0.42 h / 20 °C / Inert atmosphere View Scheme

1: potassium carbonate / acetone / 20 °C / Inert atmosphere 2: diethylaluminium chloride / hexane / 2 h / 20 °C / Inert atmosphere 3: boron tribromide / dichloromethane / 0.42 h / 20 °C / Inert atmosphere View Scheme

1.1: dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct; sodium carbonate / ethylene glycol dimethyl ether; water / 18 h / 80 °C / Inert atmosphere 2.1: triethylamine / dichloromethane / 0.5 h / Inert atmosphere; Cooling with ice 2.2: 2.08 h / 20 °C / Inert atmosphere 2.3: 18 h / 140 °C / Inert atmosphere 3.1: sodium iodide; zinc / N,N-dimethyl-formamide / 18 h / 140 °C / Inert atmosphere 4.1: potassium carbonate / acetone / 20 °C / Inert atmosphere 5.1: diethylaluminium chloride / hexane / 2 h / 20 °C / Inert atmosphere 6.1: boron tribromide / dichloromethane / 0.42 h / 20 °C / Inert atmosphere View Scheme

1.1: triethylamine / dichloromethane / 0.5 h / Inert atmosphere; Cooling with ice 1.2: 2.08 h / 20 °C / Inert atmosphere 1.3: 18 h / 140 °C / Inert atmosphere 2.1: sodium iodide; zinc / N,N-dimethyl-formamide / 18 h / 140 °C / Inert atmosphere 3.1: potassium carbonate / acetone / 20 °C / Inert atmosphere 4.1: diethylaluminium chloride / hexane / 2 h / 20 °C / Inert atmosphere 5.1: boron tribromide / dichloromethane / 0.42 h / 20 °C / Inert atmosphere View Scheme

1: 29.2 percent / acetic acid / 0.25 h / Ambient temperature 2: 1.) methyl iodide, Mg / 1.) ether, reflux, 5 h; 2.) ether, -15 deg C, 30 min 3: 80 percent / BCl3 / chlorobenzene / 1 h / -15 °C View Scheme

1: 1.) methyl iodide, Mg / 1.) ether, reflux, 5 h; 2.) ether, -15 deg C, 30 min 2: 80 percent / BCl3 / chlorobenzene / 1 h / -15 °C View Scheme

trifluoroacetic acid in benzene

1.1: dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct; sodium carbonate / ethylene glycol dimethyl ether; water / 18 h / 80 °C / Inert atmosphere 2.1: triethylamine / dichloromethane / 0.5 h / Inert atmosphere; Cooling with ice 2.2: 2.08 h / 20 °C / Inert atmosphere 2.3: 18 h / 140 °C / Inert atmosphere 3.1: sodium iodide; zinc / N,N-dimethyl-formamide / 18 h / 140 °C / Inert atmosphere 4.1: potassium carbonate / acetone / 20 °C / Inert atmosphere 5.1: diethylaluminium chloride / hexane / 2 h / 20 °C / Inert atmosphere 6.1: boron tribromide / dichloromethane / 0.42 h / 20 °C / Inert atmosphere View Scheme