1: 82 percent / AgSO3CF3, Me2NCONMe2 / CH2Cl2 / Ambient temperature 2: 87 percent / NaOMe / methanol; tetrahydrofuran / 16 h / Ambient temperature 3: 85 mg / H2 / Pd-C / ethanol / 16 h / 25 °C View Scheme

manganese; chloro-trimethyl-silane; bis(cyclopentadienyl)titanium dichloride in tetrahydrofuran T=20°C; 12 h;