water; 1,8-diazabicyclo[5.4.0]undec-7-ene T=60°C; 1 h; Green chemistry; Temperature; regioselective reaction;

1: benzyl alcohol With sodium azide; tetra-(n-butyl)ammonium iodide; triethylamine; 1-(toluene-p-sulphonyl)imidazole in N,N-dimethyl-formamide T=80°C; 10 h; 2: acetylacetone With potassium hydroxide in dimethyl sulfoxide; N,N-dimethyl-formamide T=20 - 80°C; 12 h;

sodium hydride; Methanesulfonyl azide in acetonitrile 24 h; Ambient temperature;

copper(l) iodide; oxygen; N-ethyl-N,N-diisopropylamine in 1,4-dioxane T=80°C; 12 h; regioselective reaction;

4-toluenesulfonyl azide; lithium tert-butylate in dichloromethane T=20°C; 0.5 h; regiospecific reaction;

1: silica gel / dichloromethane / 12 h / 20 °C 2: lithium tert-butylate; 4-toluenesulfonyl azide / dichloromethane / 0.5 h / 20 °C View Scheme