1.1: sodium hydride / tetrahydrofuran; mineral oil / 0.5 h / 0 - 20 °C / Inert atmosphere 1.2: 0.5 h / 0 °C / Inert atmosphere 1.3: 0 - 20 °C / Inert atmosphere 2.1: 2,2'-azo-bisisobutyronitrile; tri-n-butyl-tin hydride / toluene / 2 h / Inert atmosphere; Reflux 3.1: methanol; toluene-4-sulfonic acid / 0.5 h / 0 - 20 °C / Inert atmosphere 4.1: dimethyl sulfoxide; 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane / 2 h / 0 - 20 °C / Inert atmosphere 5.1: magnesium / tetrahydrofuran / 0.5 h / 0 - 20 °C / Inert atmosphere 5.2: 0 - 20 °C / Inert atmosphere 5.3: 20 °C 6.1: dimethyl sulfoxide; 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dichloromethane / 2 h / 0 - 20 °C / Inert atmosphere 7.1: palladium 10 on activated carbon; hydrogen / benzene / 4 h / 20 °C View Scheme