85355-31-3

Upstream product

• 400-98-6 4-trifluoromethyl-2-nitroaniline 

Downstream Products

• 85355-49-3 (2-Nitro-4-trifluoromethyl-phenyl)-acetaldehyde 
• 85355-39-1 Acetic acid 1-chloro-2-(2-nitro-4-trifluoromethyl-phenyl)-ethyl ester 
• 13544-43-9 6-(trifluoromethyl)-1H-indole 
• 398452-69-2 2-Hydroxy-2'-nitro-4'-trifluoromethyl-4,5-dimethylazobenzene 
• 286471-09-8 2-hydroxy-2'-nitro-4'-trifluoromethyl-3-α-cumyl-5-tert-octylazobenzene 
• 398474-48-1 5-trifluoromethyl-2-[2-hydroxy-3-(4-chloro-α-cumyl)-5-tert-butylphenyl]-2H-benzotriazole 

Relevant academic research and scientific papers

Benzotriazoles containing phenyl groups substituted by heteroatoms and compositions stabilized therewith

2H-Benzotriazole UV absorbers substituted at the 3-position and/or the 5-position of the phenyl ring by a phenyl moiety which is substituted by a heteroatom are particularly photostable in automotive coatings, and are of low color and exhibit low volatili

Benzotriazoles containing phenyl groups substituted by heteroatoms and compositions stabilized therewith

2H-Benzotriazole UV absorbers substituted at the 3-position and/or the 5-position of the phenyl ring by a phenyl moiety which is substituted by a heteroatom are particularly photostable in automotive coatings, and are of low color and exhibit low volatili

Process for the preparation of 5-perfluoroalkyl substituted benzotriazole UV absorbers

A process for preparing 2H-benzotriazole UV absorbers containing a perfluoroalkyl moiety at the 5-position of the benzo ring, preferably a trifluoromethyl group, involves diazotizing the perfluoroalkyl substituted o-nitroaniline using concentrated sulfuric acid plus sodium nitrite or preferably nitrosylsulfuric acid to form the corresponding monoazobenzene intermediate via the diazonium salt intermediate which is reduced to the corresponding 5-perfluoroalkyl substituted 2H-benzotriazole UV absorber compound by conventional reduction means.

2H-benzotriazole UV absorders substituted with 1,1-diphenylalkyl groups and compositions stabilized therewith

2H-Benzotriazole UV absorbers substituted at the 3-position or at the 5-position of the phenyl ring by a 1,1-diphenylalkyl moiety, particularly a 1,1-diphenylethyl group, are particularly photostable in automotive coatings, and are of low color and exhibit low volatility in thermoplastic compositions.

Benzotriazoles containing α-cumyl groups substituted by heteroatoms and compositions stabilized therewith

2H-Benzotriazole UV absorbers substituted at the 3-position and/or the 5-position of the phenyl ring by α-cumyl moiety which is substituted by a heteroatom are particularly photostable in automotive coatings, and are of low color and exhibit low volatilit

Synthesis of Substituted Indoles via Meerwein Arylation

A new method for the synthesis of substituted indoles is detailed.Meerwein arylation of 4- and 6-substituted 2-nitrobenzenediazonium chlorides with vinyl acetate or vinyl bromide and subsequent reductive cyclization of the resulting adducts affords the corresponding 6- and 4-substituted (CH3, OCH3, Cl, Br, CF3) indoles.The diazonium bisulfates of weakly basic 2-nitroanilines (4-Cl, 6-Br, 4-CF3) gave higher yields of Meerwein arylation adducts than the corresponding diazonium chlorides.Coupling of 2-nitrobenzenediazonium chloride with 2-acetoxy-1-alkenes followed byreductive cyclization affords 2-alkylindoles.