in diethyl ether

potassium hydroxide; N-benzyl-N,N,N-triethylammonium chloride 1) Et2O, -19 deg C, 2 h, 2) Et2O, r.t., 4 h; Yield given. Multistep reaction. Yields of byproduct given;

1: 2) aq. KOH / 2) Et3NCH2PhCl / 1) Et2O, -19 deg C, 2 h, 2) Et2O, r.t., 4 h 2: 95 percent / Na2CO3 / acetone / Heating View Scheme