2-HEAF T=20°C; Knoevenagel condensation; 1.3 h; Ionic liquid;

triethylsilane; trifluoroacetic acid T=0 - 20°C; 5 h; Title compound not separated from byproducts.;

hydrogenchloride; amalgamated zinc

1: lithium aluminium tetrahydride / tetrahydrofuran / 12 h / 0 - 80 °C 2: hydrogenchloride / water / 1 h / 60 °C 3: hydrogenchloride / water; tert-butyl methyl ether / 18 h / 20 °C 4: sodium hydrogencarbonate / water / 0.5 h / 20 °C View Scheme

1: lithium aluminium tetrahydride / tetrahydrofuran / 12 h / 0 - 80 °C 2: hydrogenchloride / water / 1 h / 60 °C 3: hydrogenchloride / water; tert-butyl methyl ether / 18 h / 20 °C View Scheme