dihydrogen peroxide; sodium hydroxide in methanol; water T=20 - 70°C; 6 h; Reflux;

1.1: hydrogenchloride / 8 h / -10 - 35 °C 1.2: 0.17 h / 60 °C / Active charcoal addition 2.1: sodium hydroxide; water / tetrahydrofuran / 2.17 h / 40 °C 3.1: benzotriazol-1-ol; lithium hydroxide hydrate / water / 0.17 h 3.2: 4 h / 23 °C 3.3: pH 3 4.1: N-ethyl-N,N-diisopropylamine / dichloromethane / 1 h / -20 - 0 °C 5.1: sodium hydride / dichloromethane; N,N-dimethyl-formamide / 4 h / 23 °C 6.1: lithium hydroxide hydrate / tetrahydrofuran / 1.5 h / 35 °C 6.2: pH 4 7.1: diisopropyl-carbodiimide; benzotriazol-1-ol / dichloromethane / 2 h / 20 - 23 °C 8.1: hydrogen / 5 palladium on charcoal / methanol / 4 h / 65 °C / 7500.75 Torr View Scheme

Multi-step reaction with 3 steps 1.1: hydrogenchloride / 8 h / -10 - 35 °C1.2: 0.17 h / 60 °C / Active charcoal addition2.1: sodium hydroxide; water / tetrahydrofuran / 2.17 h / 40 °C3.1: diisopropyl-carbodiimide; N-ethyl-N,N-diisopropylamine / dichloromethane / 16 h / 2 - 23 °C