1: pyridine / 1 h / 0 °C 2: 1.) LiBr, Li2CO3, DMF, 2.) H2 / 2.) 5percent Pd/C / 1.) 150 deg C, 4 h, 2.) ethyl acetate, RT, 8 h 4: 5percent sodium amalgam / tetrahydrofuran; methanol / 9 h / -20 - 20 °C 5: n-Bu4NF / tetrahydrofuran / 2 h / Ambient temperature View Scheme