1: With copper dichloride; isopentyl nitrite in triglyme (triethylene glycol dimethyl ether); acetonitrile T=20°C; 0.5 h; 2: 4-Methyl-2-amino-1,3-benzothiazole in triglyme (triethylene glycol dimethyl ether); acetonitrile T=20 - 50°C; 2.66667 h; 3: With hydrogenchloride in triglyme (triethylene glycol dimethyl ether); water; acetonitrile T=20°C;

thionyl chloride T=55°C; 6 h;