38224-46-3

Upstream product

• 854047-77-1 C₁₂H₇Br₂N₃O 
• 1601-98-5 1,2-bis(4-bromophenyl)diazene 
• 1601-98-5 (E)-bis(4-bromophenyl)diazene 
• 364-73-8 4-Bromo-1-fluoro-2-nitrobenzene 

Relevant academic research and scientific papers

AgNO3 as nitrogen source for rhodium(III)-catalyzed synthesis of 2-aryl-2H -benzotriazoles from azobenzenes

A new approach has been established for Rh(iii)-catalyzed direct aza oxidative cyclization of non-prefunctionalized azobenzenes to provide 2-aryl-2H-benzotriazoles in good yields, in which AgNO3 instead of conventional azide reagents for the first time functions as the nitrogen source for the nitrogenation reaction. Preliminary mechanistic studies suggest that the Rh(iii)-catalyst could account for the nitration reaction, and subsequently cationic silver species might both play a vital role in the fission of the nitrogen-oxygen bonds in nitro groups and promote aza oxidative cyclization.

FLUORESCENT ORGANIC LIGHT EMITTING ELEMENTS HAVING HIGH EFFICIENCY

The present invention relates to organic light emitting elements, comprising thermally acti-vated delayed fluorescence (TADF) emitters and/or hosts on basis of benzotriazoles, which have a sufficiently small energy gap between S1 and T1/s

Palladium-Catalyzed Synthesis of 2-Aryl-2H-Benzotriazoles from Azoarenes and TMSN3

Substrate-directed ortho C-H amination of azoarenes using TMSN3 as the source of nitrogen leading to the synthesis of 2-aryl-2H-benzotriazoles has been accomplished with the help of Pd/TBHP combinations. An intermolecular o-azidation (C-N bond formation) followed by an intramolecular N-N bond formation via nucleophilic attack of one of the azo nitrogen onto the o-azide nitrogen leads to cyclization with the expulsion of N2.

ELECTROLUMINESCENT DEVICE

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 electroluminescen