hydrogenchloride; hydrazine hydrate in ethanol

diphenyl phosphoryl azide; triethylamine Curtius rearrangement; Inert atmosphere;

1: 1,4-Diiodobenzene With copper(l) iodide; triethylamine; bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran T=20°C; 0.25 h; 2: benzyl but-3- yn-1-ylcarbamate in tetrahydrofuran T=20°C;

1: 1,4-Diiodobenzene With triethylamine; copper(l) iodide in tetrahydrofuran 2: benzyl but-3- yn-1-ylcarbamate With bis-triphenylphosphine-palladium(II) chloride in tetrahydrofuran T=20°C; 0.25 h;