2,4,4,6-tetrabromocyclohexane in dichloromethane T=20°C; 2.5 h;

tris-(dibenzylideneacetone)dipalladium(0) in dichloromethane; water; toluene

1: 4-bromo-2,6-diethyl aniline With hydrogenchloride; sodium nitrite in water T=5°C; 0.5 h; 2: With sodium hydrogencarbonate in water 3: potassium cyanide; copper (I) cyanide in water T=70°C; 1 h;

tert.-butylnitrite; iodine in acetonitrile T=20 - 30°C; 4 h;