copper(l) iodide; dimethylsulfide 1.) THF, 2.) THF, -78 deg C, 2 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

dimethylsulfide; boron trifluoride diethyl etherate; lithium iodide in tetrahydrofuran T=-100°C; 3 h; other substituted organocopper and organocuprate reagents, other solvents, var. temp. and time; Product distributionMechanism;