in diethyl ether; hexane; benzene

1: 72 percent / amberlite IR-120 (H+ form) / 3 h / 60 - 65 °C 2: 1.) sodium bis(trimethylsilyl)amide / 1.) diethyl ether, 30 min, 2.) diethyl ether, RT, 2 h View Scheme

sodium hexamethyldisilazane 1.) diethyl ether, 30 min, 2.) diethyl ether, RT, 2 h; Yield given. Multistep reaction;