1: 2-chloro-ethanol With tetra-(n-butyl)ammonium iodide; potassium iodide in tetrahydrofuran; N,N-dimethyl-formamide T=80°C; 24 h; polystyrene/1percent divinylbenzene resin; Inert atmosphere; 2: With acetic anhydride; 1,8-diazabicyclo[5.4.0]undec-7-ene in tetrahydrofuran T=0 - 20°C; polystyrene/1percent divinylbenzene resin; 3: 1-azido-2-chlorobenzene Further stages;

1: in dimethyl sulfoxide T=20°C; 0.25 h; 2: With water in dimethyl sulfoxide

copper(l) iodide; triethylamine in dimethyl sulfoxide T=20°C; P=760.051 Torr; 24 h;

copper(l) iodide; Na-ascorbate in water; acetonitrile T=90°C; 5 h;