methyllithium; hydrogen; platinum on activated charcoal 1) ether, - 40 deg C, 2) ether, 1.5 h, 1 atm; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

methyllithium; hydrogen; platinum on activated charcoal 1) ether, - 40 deg C, 2) ether, 1.5 h, 1 atm; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

methyllithium in diethyl ether T=-40°C; Title compound not separated from byproducts;

methyllithium in diethyl ether T=-70°C;