1: 99 percent / lithium aluminum hydride / diethyl ether 2: 84 percent / imidazole; DMAP / dimethylformamide 3: 100 percent / aq. acetic acid / dimethylformamide 4: 92 percent / DMAP / pyridine 5: 86 percent / sodium borohydride / methanol 6: 95 percent / sodium azide / dimethylformamide 7: 90 percent / DMAP / pyridine 8: 98 percent / hydrogen / Pd/C / methanol 9: 71 percent / potassium tert-butoxide / dimethylformamide; benzene 10: 57 percent / tetrabutylammonium fluoride / tetrahydrofuran 11: 93 percent / carbon tetrabromide; triphenylphosphine / CH2Cl2 12: 80 percent / potassium tert-butoxide / dimethylsulfoxide 13: 95 percent / ozone / methanol View Scheme