1: With lithium diisopropyl amide in tetrahydrofuran; n-heptane; ethylbenzene T=-25 - 0°C; 1.08333 h; 2: With iodine in tetrahydrofuran; n-heptane; ethylbenzene T=-15 - 10°C; 2 h;

mercury(II) diacetate; acetic acid; sodium chloride Zusatz von wss. Salzsaeure;