n-butyllithium; water; iodine 1.) THF, -78 deg C, 10 min, 2.) THF, -78 deg C, 20 min, 3.) -78 deg C to room temperature; Yield given. Multistep reaction;

water; iodine 1.) THF, -78 deg C, 10 min, 2.) THF, -78 deg C, 20 min, 3.) -78 deg C to room temperature; Yield given. Multistep reaction;

copper(l) iodide; n-butyllithium 1.) THF, hexane, -78 deg C, 10 min, 2.) THF, hexane, a) -78 deg C, 15 min, b) reflux, 12 h; Yield given. Multistep reaction;