1: With 1,3-bis-(diphenylphosphino)propane; palladium diacetate in N,N-dimethyl acetamide T=20°C; Inert atmosphere; 2: styrene; .beta.-dibromonaphthaline With tetrabutylammomium bromide; potassium carbonate in N,N-dimethyl acetamide T=100 - 140°C; Mizoroki-Heck reaction; Inert atmosphere;