1: 96 percent / hydrogen, sodium acetate / Pd-C, quinoline / methanol / 2.5 h / Ambient temperature 2: 96 percent / 1,8-diazabicyclo<5.4.0>undec-7-ene (DBU) / acetonitrile / 12 h / 25 °C View Scheme

1: 80 percent / tetrahydrofuran / 5 h / -78 °C 2: 6 percent / Fe(acac)3 / tetrahydrofuran / 24 h / 20 °C View Scheme