hydrogenchloride; n-butyllithium; copper (I) iodide; dimethylsulfide; water Yield given. Multistep reaction. Yields of byproduct given;

1: 1.) nBuLi, 2.) tBuOK-tBuOH / 1.) THF, -78 deg C, 1 h, 2.) THF, a) 0 deg C, 1 h, b) RT, 6 h 2: 1.) NaHMDS / 1.) THF, -78 deg C, 20 min, 2.) THF, from -78 deg C to 10 deg C View Scheme

hydrogenchloride; n-butyllithium; copper (I) iodide; dimethylsulfide; water Yield given. Multistep reaction. Yields of byproduct given;