benzotriazol-1-ol; O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine in 1-methyl-pyrrolidin-2-one T=-5 - 23°C; 12.25 h; Inert atmosphereLarge scale; TemperatureSolvent;