1: 88 percent / CCl4, PPh3 2: 79 percent 3: 78 percent / imidazole / dimethylformamide 4: 2) Et2NH, CuI / 1) Pd(PPh3)4 / 1) benzene, rt, 1 h, 2) 5 h 5: 91 percent / H2 / Lindlar catalyst / ethanol 6: 92 percent / n-Bu4NF / tetrahydrofuran / 12 h / Ambient temperature 7: 73 percent / K2CO3 / methanol; H2O / Ambient temperature View Scheme