78411-63-9

Upstream product

• 78411-57-1 5-(2,4-dimethoxyphenyl)-1-(2-nitrophenyl)-1H-tetrazole 
• 78411-62-8 2-(2,6-dimethoxyphenyl)benzotriazole 

Downstream Products

• 1426261-76-8 2-(2-hydroxy-6-methoxy)-2H-benzotriazole 
• 1426261-77-9 2-(2,6-dihydroxy-3-tert-butylphenyl)-2H-benzotriazole 

Relevant academic research and scientific papers

Synthesis and structural study of 2-arylbenzotriazoles related to Tinuvins

A total number of nineteen 2-arylbenzotriazoles related to the UV absorber Tinuvin P have been studied. Moreover, besides those bearing a 2′-hydroxy substituent, known to experience ESIPT (Excited-State Intramolecular Proton Transfer), we have also prepared three compounds having another ortho-hydroxy group at position 6′. The X-ray molecular structures of five key representatives have been determined and some important features related to their behavior discussed on the basis of solution and solid-state NMR, as well as B3LYP/6-311++G(d,p) computational results.

New Synthesis of Benzotriazole Photostabilizers

1-(2-Nitrophenyl)-5-aryltetrazoles and 1-aryl-5-(2-nitrophenyl)tetrazoles are converted into 2-arylbenzotriazoles by the action of heat, the former reacting much faster than the latter.By appropriate use of methoxyl groups, useful benzotriazole ultraviolet absorbers may be synthesized conveniently by this method.