hydrogenchloride; Zn–Hg amalgam; acetic anhydride in diethyl ether T=-20°C; Mechanism;

zinc(II) iodide

1: 69 percent / zinc iodide 2: diethyl ether / 1) -78 deg C, 20 min, 2) 0 deg C, 10 min 3: m-CPBA, K2HPO4 / methanol / 2 h / Ambient temperature View Scheme