1: ammonium thiocyanate With bromine; triphenylphosphine in acetonitrile T=20°C; Addition; 2: Benzhydryloxy-tert-butyl-dimethyl-silane in acetonitrile T=20°C; Substitution;

iron(III) chloride; 1-n-butyl-3-methylimidazolium chloride T=20°C; 0.25 h;

pyridine hydrogenfluoride T=19°C; 2.5 h;