21371-50-6

Upstream product

• 22358-68-5 4-hydroxy-3-((2-nitrophenyl)diazenyl)benzoic acid 
• 99-76-3 methyl 4-hydroxylbenzoate 
• 88-74-4 2-nitro-aniline 
• 2440-22-4 2-(2-Hydroxy-5-methylphenyl)benzotriazole 
• 69698-20-0 2-(2H-1,2,3-benzotriazol-2-yl)-4-methylphenyl acetate 
• 119-66-4 2-nitrobenzenediazonium chloride 
• 1435-71-8 2-nitro-2'-hydroxy-5'-methyl-azobenzene 
• 106-44-5 p-cresol 
• 114226-64-1 2-(2H-1,2,3-benzotriazol-2-yl)-4-dibromomethylphenyl acetate 
• 114226-62-9 2-(2H-1,2,3-benzotriazol-2-yl)-4-hydroxybenzenecarboxaldehyde 

Downstream Products

• 21371-52-8 3-(2H-benzo[d][1,2,3]triazol-2-yl)-4-hydroxybenzoic acid hexyl ester 

Relevant academic research and scientific papers

Novel polycyclic compound

The invention provides a novel polycyclic compound as well as a synthesis method and application thereof. The compound of the present invention includes a plurality of carbocyclic and/or heterocyclicstructures having visible or fluorescent light emitting groups and covalently bonded to at least one ultraviolet and/or visible (blue) light absorbing group to provide stability. The compound providedby the invention can be used as a light conversion agent, a dye, a pigment, a fluorescent agent and an ultraviolet light or blue light absorbent, and can be applied to optical films, agricultural films, optical discs (disks), optical lenses, goggles, skin care, cosmetics, illumination, coatings, adhesives, light stabilizers, panels and other products.

A convenient protocol for the synthesis of 2-(2′-Hydroxy-5′- carboxyphenyl)-2H-benzotriazole to avoid decarboxylation when using p-hydroxybenzoic acid as coupling component

In the study of the synthesis of 2-(2′-hydroxy-5′- carboxyphenyl)-2H-benzotriazole, we found that decarboxy intermediate-4-((2- nitrophenyl)diazenyl)phenol was obtained when using p-hydroxybenzoic acid as coupling component. A convenient protocol for the synthesis of 2-(2′-hydroxy-5′-carboxyphenyl)-2H-benzotriazole is reported with methyl-p-hydroxybenzoate as coupling component. Different dizao components and different coupling components were also used for further investigation of decarboxylation.

Synthesis of new ultraviolet light absorbers based on 2-aryl-2H- benzotriazoles

A procedure for the synthesis of some new ultraviolet absorbers of the benzotriazole series is reported. The compounds bear a carboxylic or a formyl group para to the hydroxy group, and these functionalities impart to the absorbers improved compatibility with certain disperse dyes on polyester fibers.

2-hydroxyphenylbenzotriazol compounds and the use thereof

Provided are 2-hydroxyphenylbenzotriazol compounds with excellent ultraviolet absorbability and high thermal stability. They can be used as ultraviolet absorber for any polymer.