1: palladium 10 on activated carbon; hydrogen / methanol / 48 h / 760.05 Torr 2: benzotriazol-1-ol; O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / 1-methyl-pyrrolidin-2-one / 12.25 h / -5 - 23 °C / |Inert atmosphere; |Large scale View Scheme