lithium bromide; magnesium bromide 2.) THF, -15 deg C, 2-3 h; Yield given. Multistep reaction. Yields of byproduct given;

copper(l) iodide 1.) ether, irradiation, 15 min, -15 deg C; 2.) ether, -20 deg C to -15 deg C, 3-5 h; Yield given. Multistep reaction. Yields of byproduct given;