1: hydrogen; palladium 10 on activated carbon / N,N-dimethyl-formamide 2: N-ethyl-N,N-diisopropylamine / dichloromethane 3: methanol / |Acidic conditions View Scheme

1: benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / dichloromethane 2: hydrogen; palladium 10 on activated carbon / N,N-dimethyl-formamide 3: N-ethyl-N,N-diisopropylamine / dichloromethane 4: methanol / |Acidic conditions View Scheme