1: With sodium bis(2-methoxyethoxy)aluminium dihydride in diethyl ether; toluene T=0 - 20°C; 1.08333 h; 2: With ethyl acetate in diethyl ether; toluene T=0°C; 0.166667 h; 3: With iodine in diethyl ether; toluene T=-78 - 20°C; 2 h;