1: 77.2 percent / KOH / H2O; methanol / 16 h 2: tionyl chloride, dimethylformamide / CH2Cl2 / 1.) 2 h, RT, 2.) 1 h, reflux 3: aluminium chloride / CH2Cl2 / 0.17 h / Ambient temperature 4: Et3N / CHCl3 / 2.5 h View Scheme

lithium aluminium tetrahydride in diethyl ether