1: 3-iodobenzenediazonium tetrafluoroborate; tBuCH2CH2B(H)NiPr2 With biscyclopentadienyliron(II) in acetonitrile T=20°C; 2.5 h; 2: With methanol in acetonitrile T=0 - 20°C; 1 h; 3: 2,3-dimethylbutane-2,3-diol in diethyl ether; acetonitrile T=20°C; 4 h; Reagent/catalyst;

1: 1,3-diiodobenzene With isopropylmagnesium chloride lithium chloride complex in tetrahydrofuran T=-20°C; 1 h; 2: MeOB(pin) in tetrahydrofuran T=-20 - 20°C;

in diethyl ether T=20°C; 4 h; Inert atmosphere;

in ethyl acetate T=20°C; 4 h;

tert.-butylnitrite in acetonitrile T=80°C; 2 h;

1.1: 68 percent / 2 h / 68 °C 2.1: iPrMgCl*LiCl / tetrahydrofuran / 1 h / -20 °C 2.2: 88 percent / tetrahydrofuran / -20 - 20 °C View Scheme

1.1: tetrafluoroboric acid / water / 0.17 h / 0 °C 1.2: 1 h / 0 °C 1.3: 2.5 h / 20 °C / |Inert atmosphere 2.1: diethyl ether / 4 h / 20 °C View Scheme