n-butyllithium; hexane; methyl iodide 1.) ether, THF, -70 deg C, 15 min, 2.) r.t., 2 h; Yield given. Multistep reaction. Yields of byproduct given;

n-butyllithium; hexane 1.) ether, THF, -70 deg C, 15 min, 2.) r.t., 2 h; Yield given. Multistep reaction. Yields of byproduct given;