tert.-butyl lithium in diethyl ether; pentane T=-78°C; 0.0833333 h; Yield given;

methanol; tert.-butyl lithium 1.) pentane, diethyl ether, -78 deg C 2.) room temp. 1 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;