A catalytic and step economic protocol for the construction of N‐2‐aryl‐naphthotriazoles via copper‐catalyzed cyclization of aryl amines and aryldiazonium salts is reported. With dioxygen in the air as termial oxidants under copper catalysis, various N‐2‐aryl‐naphthotriazoles were synthesized in high yields. Importantly, this protocol features the sufficient inhibition of the classic C‐N2 bond cleavage
Disclosed are electroluminescent devices that comprise organic layers that contain certain 2H-benzotriazole compounds. The 2H-benzotriazole compounds are suitable components of blue-emitting, durable, organo-electrouminescent layers. The electroluminescent devices may be employed for full color display panels in for example mobile phones, televisions and personal computer screens.