1: 71 percent / imidazole / dimethylformamide 2: 95 percent / pyridine / CH2Cl2 3: 86 percent / 1.) H2; 2.) sodium acetate / 1.) palladium black / 1.) ethyl acetate; 2.) acetonitrile 4: lithium triethylborohydride / tetrahydrofuran 5: 1percent HCl / methanol View Scheme