1.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide / 23 h / 20 °C / Inert atmosphere 2.1: n-butyllithium; N,N,N',N,-tetramethylethylenediamine / tetrahydrofuran; hexane / 0.05 h / -98 °C / Inert atmosphere 2.2: 2 h / -98 - -60 °C / Inert atmosphere 2.3: Inert atmosphere 3.1: Cl2Ni(1,2-bis(diphenylphosphino)ethane); 1,1-dimethylethylmagnesium chloride / tetrahydrofuran; dichloromethane / 20 °C / Inert atmosphere 3.2: 20 °C / Inert atmosphere 4.1: diisopropyl-carbodiimide / dichloromethane / 24 h / 20 °C / Inert atmosphere 5.1: titanium(IV) isopropylate; n-butyllithium / tetrahydrofuran; hexane / 2 h / -78 - 50 °C / Inert atmosphere 5.2: Inert atmosphere 6.1: hydrogenchloride; water / tetrahydrofuran / 15 h / 20 °C View Scheme