1: 1H-imidazole / N,N-dimethyl-formamide 2: 1H-imidazole; iodine; triphenylphosphine / toluene 3: n-butyllithium; N,N,N',N',N'',N''-hexamethylphosphoric triamide / tetrahydrofuran 4: hydrogen; palladium on activated charcoal / ethyl acetate 5: pyridinium chlorochromate / dichloromethane 6: sodium hexamethyldisilazane / tetrahydrofuran 7: tetrabutyl ammonium fluoride / tetrahydrofuran 8: hydrogen; palladium 10 on activated carbon / ethyl acetate View Scheme