1: With lithium aluminium tetrahydride in tetrahydrofuran T=20 - 30°C; 1 h; Heating / reflux; 2: With water in tetrahydrofuran T=0 - 10°C;

nickel in ethanol Ambient temperature; Yield given;

1: N-bromosuccinimide 2: dimethylformamide / 2 h / Ambient temperature 3: 1.) hydrazin-hydrate, 2.) HCl / 1.) MeOH, 1 h, reflux, 2.) H2O, MeOH 4: Raney-Ni / ethanol / Ambient temperature View Scheme

1: dimethylformamide / 2 h / Ambient temperature 2: 1.) hydrazin-hydrate, 2.) HCl / 1.) MeOH, 1 h, reflux, 2.) H2O, MeOH 3: Raney-Ni / ethanol / Ambient temperature View Scheme

1: 1.) hydrazin-hydrate, 2.) HCl / 1.) MeOH, 1 h, reflux, 2.) H2O, MeOH 2: Raney-Ni / ethanol / Ambient temperature View Scheme