38610-46-7

Upstream product

• 6720-39-4 trans-phenyl-p-tolyl-diazene 
• 14336-14-2 (E)-(2-bromo-4-methyl-phenyl)-phenyl-diazene 
• 122652-21-5 1-(4'-methyl-2'-nitrophenyl)-5-phenyltetrazole 

Downstream Products

• 52823-53-7 5-(trans-2-dibenzofuran-3-yl-vinyl)-2-phenyl-2H-benzo[1,2,3]triazole 
• 122652-16-8 dimethyl 2-phenyl-2H-1,2,3-triazole-4,5-dicarboxylate 

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.

Copper-catalyzed cascade cyclization reaction of 2-haloaryltriazenes and sodium azide: Selective synthesis of 2 H-benzotriazoles in water

A new approach to the synthesis of 2 H-benzotriazoles is described. This strategy is based on the copper-catalyzed Ci￡N coupling of 2-haloaryltriazenes or 2-haloazo compounds with sodium azide and the intramolecular addition of nitrene to N=N bonds. This approach allows the synthesis of various N-amino- and N-aryl-2 H-benzotriazoles in water, in good to excellent yields. The procedure is simple and the starting materials and catalyst are easily available, offering a practical and convenient synthetic route to 2-substituted benzotriazoles.

Photooxidation of 2-Phenylbenzotriazoles

Irradiation, with ultraviolet light, of 2-phenylbenzotriazole in aerated solvents resulted in oxidation of the benzo ring to yield the diacid 2-phenyl-1,2,3-tiazole-4,5-dicarboxylic acid.A possible intermediate, 2-phenylbenzotriazole-4,7-dione, also yielded the diacid on photooxidation.The methyl ether of the commercial photostabilizer Tinuvin P undergoes an analogous reaction to produce the corresponding diacid.