1: 100 percent / aq. acetic acid / dimethylformamide 2: 92 percent / DMAP / pyridine 3: 86 percent / sodium borohydride / methanol 4: 95 percent / sodium azide / dimethylformamide 5: 90 percent / DMAP / pyridine 6: 98 percent / hydrogen / Pd/C / methanol 7: 71 percent / potassium tert-butoxide / dimethylformamide; benzene 8: 57 percent / tetrabutylammonium fluoride / tetrahydrofuran 9: 93 percent / carbon tetrabromide; triphenylphosphine / CH2Cl2 10: 80 percent / potassium tert-butoxide / dimethylsulfoxide 11: 95 percent / ozone / methanol View Scheme