1: 31 percent / dimethylformamide / 24 h / 35 °C 2: K2CO3, MeOH / 0.5 h / 20 °C 3: 100 percent / H2, AcOH / Pd black / 18 h View Scheme

1: 31 percent / dimethylformamide / 24 h / 35 °C 2: K2CO3, MeOH / 0.5 h / 20 °C 3: 64 percent / Ph3P, diethyl azodicarboxylate / tetrahydrofuran / 15 h / 0 °C 4: K2CO3, MeOH / 0.5 h / 20 °C 5: 100 percent / H2, AcOH / Pd black / 18 h View Scheme