1: With lithium aluminium tetrahydride in tetrahydrofuran; toluene T=0 - 20°C; 4 h; 2: With potassium fluoride; sodium sulfate in tetrahydrofuran; toluene T=0°C; 3: With hydrogenchloride in tetrahydrofuran; ethyl acetate; toluene

1: With lithium aluminium tetrahydride in tetrahydrofuran T=20°C; 4 h; Heating / reflux; 2: With sodium hydroxide; water in tetrahydrofuran 3: With hydrogenchloride in tetrahydrofuran; 1,4-dioxane; diethyl ether; water