hydrogen; palladium 10 on activated carbon in methanol T=20°C; 10 h;

sodium borohydride; hydrazine in methanol

hydrazine hydrate; nickel in ethanol 1 h; Heating;

1: 70 percent / 10percent aq. NaOH / ethanol / 1 h / Ambient temperature 2: hydrazine hydrate / Raney Ni / ethanol / 1 h / Heating View Scheme

1: SOCl2 / benzene / 4 h / Heating 2: Et3N / benzene / 2 h / Ambient temperature 3: 70 percent / 10percent aq. NaOH / ethanol / 1 h / Ambient temperature 4: hydrazine hydrate / Raney Ni / ethanol / 1 h / Heating View Scheme

1: 80 percent / HNO3 / 1 h / 0 °C 2: SOCl2 / benzene / 4 h / Heating 3: Et3N / benzene / 2 h / Ambient temperature 4: 70 percent / 10percent aq. NaOH / ethanol / 1 h / Ambient temperature 5: hydrazine hydrate / Raney Ni / ethanol / 1 h / Heating View Scheme

benzotriazol-1-ol; triethylamine; dicyclohexyl-carbodiimide in dichloromethane; N,N-dimethyl-formamide T=0 - 20°C; Inert atmosphere;