1: 4-iodo-butan-2-ol With isopropylmagnesium chloride in tetrahydrofuran T=-78°C; 0.0833333 h; 2: n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.333333 h; 3: benzaldehyde in tetrahydrofuran; hexane T=-78°C; 0.5 h; Further stages.;

sodium tetrahydroborate in methanol T=0°C; 2 h;

sodium iodide in acetone 6 h; Heating;

diphosphorous tetraiodide in carbon disulfide 4 h; Ambient temperature;

1H-imidazole; iodine; triphenylphosphine in diethyl ether; acetonitrile 2 h;

n-butyllithium 1.) THF, -40 deg C, 4h, 2.) room temperature, 12h; Yield given. Multistep reaction;