air; [IrHCl2(cod)]2 in dimethyl sulfoxide T=90°C; 12 h;

trifluorormethanesulfonic acid in isopropyl alcohol T=20°C;

hydrogenchloride in ethanol Heating;

1: allyl trifluoroacetate With hexamethyl-silane; palladium diacetate in toluene T=20°C; 2 h; Inert atmosphere; 2: N-benzylidene-p-methoxyaniline With tetrabutyl ammonium fluoride; water in tetrahydrofuran; toluene T=20°C; 22 h; Inert atmosphere;

1: 89 percent / LDA / tetrahydrofuran; hexane / 19.5 h / -70 - 20 °C 2: 85 percent / conc.H2SO4 / acetone; H2O / 5 °C View Scheme

1: With trifluorormethanesulfonic acid in acetonitrile T=20°C; 3 h; 2: With manganese triacetate in acetic acid; acetonitrile T=20°C; 24 h;

perchloric acid in acetonitrile T=20°C;

1: N-benzylidene-p-methoxyaniline With trimethylsilyl-methylmagnesium chloride; tris(4-methylphenyl)-phosphine; cobalt(II) dibromide in tetrahydrofuran 0.5 h; Inert atmosphereSchlenk techniqueCooling with ice; 2: styrene in tetrahydrofuran T=40°C; 12 h; Inert atmosphereSchlenk technique; 3: With hydrogenchloride; water in ethyl acetate T=20°C; 0.5 h; Inert atmosphere; Overall yield = 78 mg; regioselective reaction;

tetramethylene sulfide; diethylzinc in dichloromethane; toluene T=20°C; 16 h;