1: 79 percent 2: 78 percent / imidazole / dimethylformamide 3: 2) Et2NH, CuI / 1) Pd(PPh3)4 / 1) benzene, rt, 1 h, 2) 5 h 4: 91 percent / H2 / Lindlar catalyst / ethanol 5: 92 percent / n-Bu4NF / tetrahydrofuran / 12 h / Ambient temperature 6: 73 percent / K2CO3 / methanol; H2O / Ambient temperature View Scheme