1: 80 percent / nickel(II) bisacetylacetonate 2: 90 percent / stannic chloride / CH2Cl2 / 0 °C 3: stannic chloride / CH2Cl2 View Scheme

1: 1.) NaH / 1.) THF; 2.) 20 h, -78 deg C 2: 1.) CuI / 1.) THF, 10 min, -78 deg C; 2.) 2 h, -78 deg C View Scheme

1: 75 percent / Mg, Ni(II)-bisacetilacetonate / diethyl ether / 16 h / Heating 2: 1.) SnCl4; 2.) LiAlH4 / 1.) H2O, CH2Cl2, 1 h, 0 deg C; 2.) ether, reflux, 2 h View Scheme

1: 75 percent / Mg, Ni(II)-bisacetilacetonate / diethyl ether / 16 h / Heating 2: 10 percent / BF3*Et2O, CH3COOH / CH2Cl2 / 3 h / 25 °C View Scheme