ammonium formate; palladium on activated charcoal in ethanol T=23°C; 5 h;

titanocene dichloride; 4-chloro-2,6-dimethylpyridine hydrochloride; zinc in tetrahydrofuran a) RT, 12 h, b) reflux, 12 h;

1: 24 percent / lithium diethylamide 2: 32 percent / pyridine / CH2Cl2 / 2 h 3: 76 percent / sodium iodide / acetone / 0.5 h / Ambient temperature 4: 28 percent Chromat. / potassium carbonate / acetonitrile / 20 h / 20 °C / Irradiation View Scheme

tin(IV) chloride in dichloromethane T=-70°C; 0.0833333 h;

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