1: With n-butyllithium in tetrahydrofuran; hexane T=-78 - 0°C; 2: With zinc(II) chloride in tetrahydrofuran; hexane T=-78°C; 3: With phosphorus trichoride in tetrahydrofuran; hexane T=-78 - 20°C;

lithium aluminium tetrahydride in tetrahydrofuran; hexane T=-78 - 20°C;