potassium hydroxide; acetic acid 1.) EtOH, room temp., 8 h; 2.) H2O; Yield given. Multistep reaction;

in toluene 1.5 h; Heating;

1: 78 percent / aq. NaOH / CH2Cl2 / 3 h / Ambient temperature 2: 84 percent / toluene / 1.5 h / Heating View Scheme

1: 86 percent / oxalyl chloride, DMF / CH2Cl2; diethyl ether / 2 h / Ambient temperature 2: 78 percent / aq. NaOH / CH2Cl2 / 3 h / Ambient temperature 3: 84 percent / toluene / 1.5 h / Heating View Scheme