methyllithium 1.) THF, hexane, -78 deg C, 2 h, 2.) THF, hexane, -78 deg C, 4 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

1.) THF, hexane, -78 deg C, 2 h, 2.) THF, hexane, -78 deg C, 4 h; Yield given. Multistep reaction. Yields of byproduct given;