lithium; ethylamine in tetrahydrofuran T=-70°C; 0.5 h; Title compound not separated from byproducts;

naphthalenyllithium in tetrahydrofuran T=-78°C; 2 h;

oxygen; lithium; ethylamine 1.) THF, -70 deg C, 30 min; 2.) THF, MeOH, H2O, Et2O, 15 min; Yield given. Multistep reaction. Yields of byproduct given;