1: benzoic acid With O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine in dichloromethane T=20°C; 0.166667 h; Inert atmosphere; 2: N,N-bislt;(2-pyridyl)ethylgt;amine in dichloromethane T=20°C; 16 h; Inert atmosphere;

1.1: hydroxylamine hydrochloride / 96 h / 20 °C 2.1: zinc; hydrogenchloride / water / 1.5 h / 95 °C 3.1: O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine / dichloromethane / 0.17 h / 20 °C / |Inert atmosphere 3.2: 16 h / 20 °C / |Inert atmosphere View Scheme

1.1: zinc; hydrogenchloride / water / 1.5 h / 95 °C 2.1: O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; N-ethyl-N,N-diisopropylamine / dichloromethane / 0.17 h / 20 °C / |Inert atmosphere 2.2: 16 h / 20 °C / |Inert atmosphere View Scheme