1: 95 percent / sodium azide / dimethylformamide 2: 90 percent / DMAP / pyridine 3: 98 percent / hydrogen / Pd/C / methanol 4: 71 percent / potassium tert-butoxide / dimethylformamide; benzene 5: 57 percent / tetrabutylammonium fluoride / tetrahydrofuran 6: 93 percent / carbon tetrabromide; triphenylphosphine / CH2Cl2 7: 80 percent / potassium tert-butoxide / dimethylsulfoxide 8: 95 percent / ozone / methanol View Scheme