1: 2-bromo-naphthalene With iodine; magnesium in tetrahydrofuran T=60°C; 3 h; Inert atmosphereReflux; 2: 2,4,6-trichloro-1,3,5-triazine in tetrahydrofuran T=10 - 20°C; 5.5 h; Cooling with ice; 3: With hydrogenchloride; water in tetrahydrofuran T=15°C; 0.5 h; Cooling with ice;