1.1: Inert atmosphere 2.1: triethylamine / Inert atmosphere 3.1: pyridinium chlorochromate / Inert atmosphere 4.1: sodium hexamethyldisilazane / tetrahydrofuran / 0.5 h / -78 °C / Inert atmosphere 4.2: 1.5 h / -78 - 0 °C / Inert atmosphere 5.1: tetrakis(triphenylphosphine) palladium(0) / tetrahydrofuran; water / 3.33 h / 20 °C / Inert atmosphere 6.1: diethyl ether / 0.25 h / 0 °C / Inert atmosphere 7.1: toluene / 6 h / Inert atmosphere; Reflux 8.1: tetrabutyl ammonium fluoride / tetrahydrofuran / Inert atmosphere 9.1: lithium hydroxide hydrate / tetrahydrofuran / 1.5 h / Inert atmosphere 10.1: pyridine / toluene / 2.5 h / Inert atmosphere; Reflux 11.1: diethyl ether / 0.33 h / 0 °C / Inert atmosphere 12.1: 1,8-diazabicyclo[5.4.0]undec-7-ene / dichloromethane / 4 h / 20 °C / Inert atmosphere 13.1: Cu(I)CN / tetrahydrofuran / 0.5 h / -78 °C / Inert atmosphere 13.2: 0.75 h / -78 °C / Inert atmosphere 14.1: dimethylsulfide; oxygen; ozone / methanol; dichloromethane / 2 h / -116 - 20 °C / Inert atmosphere 15.1: diethyl ether / 0 °C / Inert atmosphere 16.1: potassium hexamethylsilazane / tetrahydrofuran / 0.25 h / -78 °C / Inert atmosphere 16.2: 1.5 h / -78 - 0 °C / Inert atmosphere 17.1: triethylsilane; tetrakis(triphenylphosphine) palladium(0); lithium chloride / N,N-dimethyl-formamide / 2 h / 55 °C / Inert atmosphere 18.1: lithium hydroxide hydrate / tetrahydrofuran / 10 h / 0 - 20 °C / Inert atmosphere 19.1: trifluoroacetic acid / tetrahydrofuran; dichloromethane / 10 h / Inert atmosphere View Scheme

1.1: 2 h / Reflux 2.1: triethylamine / dichloromethane / 0.33 h / 20 °C 2.2: 18.5 h View Scheme

1: Inert atmosphere 2: triethylamine / Inert atmosphere 3: pyridinium chlorochromate / Inert atmosphere View Scheme

1.1: 2 h / Reflux 2.1: triethylamine / dichloromethane / 0.33 h / 20 °C 2.2: 18.5 h 3.1: 1H-imidazole / N,N-dimethyl-formamide / 16 h / 20 °C 4.1: sodium hydroxide / methanol; water / 5 h / Reflux View Scheme

2 h; Reflux;

1.1: Inert atmosphere 2.1: triethylamine / Inert atmosphere 3.1: pyridinium chlorochromate / Inert atmosphere 4.1: sodium hexamethyldisilazane / tetrahydrofuran / 0.5 h / -78 °C / Inert atmosphere 4.2: 1.5 h / -78 - 0 °C / Inert atmosphere View Scheme