1: 5-nitro-isoindole-1,3-dione With potassium hydroxide in methanol; ethanol T=20°C; 3 h; 2: 2-bromoethyl halide With potassium carbonate in N,N-dimethyl-formamide 1 h; Reflux;

1.1: nitric acid; sulfuric acid / 16 h / 5 - 20 °C 2.1: potassium hydroxide / methanol; ethanol / 3 h / 20 °C 2.2: 1 h / |Reflux View Scheme

phosphorus tribromide

palladium on activated charcoal; ammonium formate in tetrahydrofuran T=20°C; 12 h;