[bis(acetoxy)iodo]benzene in acetic acid T=20°C; Oxidation; 8 h;

ClTi(OoPr)3; cyclopentyl-magnesium chloride in tetrahydrofuran Ambient temperature;

samarium diiodide; lithium diisopropyl amide 1.) THF, hexane, -78 deg C, 1.5 h, 2.) -78 edg C to room temp; 1 h; Yield given. Multistep reaction;