thionyl chloride T=0°C; Reflux;

[I(py)2]BF4; trifluorormethanesulfonic acid in dichloromethane 0.5 h;

1: dihydrogen peroxide; potassium hydroxide / methanol; water / 0.5 h / 65 °C / Inert atmosphere 2: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / Inert atmosphere 3: 0.5 h / Inert atmosphere View Scheme

1: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / Inert atmosphere 2: 0.5 h / Inert atmosphere View Scheme

1: 74 percent / CF3SO3H; IPy2BF4 / CH2Cl2 / 0.5 h View Scheme

0.5 h; Inert atmosphere;

1.1: bis-triphenylphosphine-palladium(II) chloride; triethylamine; zinc(II) chloride; zinc / tetrahydrofuran / 24 h / 60 °C / Inert atmosphere 2.1: potassium hydroxide / aacetone / 2 h / Reflux; Inert atmosphere 3.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / benzene / 2 h / Inert atmosphere; Reflux 4.1: lithium aluminium tetrahydride / tetrahydrofuran / 0.33 h / 20 °C / Inert atmosphere 4.2: 20 °C View Scheme

1: bis-triphenylphosphine-palladium(II) chloride; triethylamine; zinc(II) chloride; zinc / tetrahydrofuran / 24 h / 60 °C / Inert atmosphere 2: potassium hydroxide / aacetone / 2 h / Reflux; Inert atmosphere 3: 2,3-dicyano-5,6-dichloro-p-benzoquinone / benzene / 2 h / Inert atmosphere; Reflux View Scheme