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