23939-33-5

Basic information

• Product Name: Phenol,2-(2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methyl-
• Synonyms: p-Cresol,2-(2H-benzotriazol-2-yl)-6-tert-butyl- (7CI,8CI);2-(2-Hydroxy-3-tert-butyl-5-methylphenyl)benzotriazole;2-(2'-Hydroxy-3'-tert-butyl-5'-methylphenyl)benzotriazole;2-(3-tert-Butyl-2-hydroxy-5-methylphenyl)benzotriazole; Tinuvin 282
• CAS NO: 23939-33-5
• Molecular Formula: C17H19 N3 O
• Molecular Weight: 281.357
• Mol File: 23939-33-5.mol
• Article Data: 5

Chemical Properties

• CAS DataBase Reference: Phenol,2-(2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Phenol,2-(2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methyl-(23939-33-5)
• EPA Substance Registry System: Phenol,2-(2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methyl-(23939-33-5)

Safety Data

• Hazardous Substances Data: 23939-33-5(Hazardous Substances Data)

Upstream product

• 84755-47-5 2-(2'H-benzotriazol-2'-yl)-6-t-butyl-4-methylphenol 1'-oxide 
• 22617-04-5 2-nitro-4-chloro-2'-hydroxy-3'-tert-butyl-5'-methylazobenzene 
• 89-63-4 4-Chloro-2-nitroaniline 
• 88-74-4 2-nitro-aniline 
• 56750-11-9 2-tert-Butyl-6-(6-chloro-1-oxy-benzotriazol-2-yl)-4-methyl-phenol 
• 119-66-4 2-nitrobenzenediazonium chloride 
• 2409-55-4 2-tert-Butyl-4-methylphenol 
• 3896-11-5 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-2H-5-chlorobenzotriazole 
• 84755-49-7 2-tert-Butyl-4-methyl-6-(2-nitro-phenylazo)-phenol 

Downstream Products

• 861395-94-0 2-(2H-1,2,3-benzotriazol-2-yl)-6-tert-butyl-4-dibromomethylphenyl acetate 
• 861395-96-2 2-(2H-1,2,3-benzotriazol-2-yl)-5-tert-butyl-4-hydroxybenzenecarboxaldehyde 
• 861395-93-9 2-(2H-1,2,3-benzotriazol-2-yl)-6-(tert-butyl)-4-methylphenyl acetate 
• 2440-22-4 2-(2-Hydroxy-5-methylphenyl)benzotriazole 

Relevant articles and documents

Preparation of 2-aryl-2H-benzotriazoles by zinc-mediated reductive cyclization of o-nitrophenylazophenols in aqueous media without the use of organic solvents

Zinc powder-mediated reductive cyclization of o-nitrophenylazophenols in alkaline solution affords the corresponding 2-aryl-2H-benzotriazoles in high yields under mild reaction conditions. No organic solvents are used in the reaction and only minimal amounts in the work-up.

Method of preparing 2-phenyl benzotriazoles

A method of preparing 2-phenylbenzotriazoles expressed by Formula I: STR1 (wherein R1 denotes a hydrogen or chlorine atom, a lower alkyl group having 1 to 4 carbon atoms, a lower alkoxyl group having 1 to 4 carbon atoms, a carboxyl group or a sulfonic acid group; R2 denotes a hydrogen or chlorine atom, a lower alkyl group having 1 to 4 carbon atoms or a lower alkoxyl group having 1 to 4 carbon atoms; R3 denotes a hydrogen or chlorine atom, an alkyl group having 1 to 12 carbon atoms, a lower alkoxyl group having 1 to 4 carbon atoms, a phenyl group, a phenyl group substituted by an alkyl group having 1 to 8 carbon atoms, a phenoxy group or a phenylalkyl group with an alkyl part having 1 to 4 carbon atoms; R4 denotes a hydrogen or chlorine atom, a hydroxyl group or an alkoxyl group having 1 to 4 carbon atoms; and R5 denotes a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or a phenylalkyl group with an alkyl part having 1 to 4 carbon atoms) comprises reduction with hydrogen of o-nitroazobenzene derivatives expressed by Formula II: STR2 (wherein R1, R2, R3, R4 and R5 each denote the same as in Formula I), the reduction being effected in a solvent containing water.

The Reduction of Some o-Nitrophenylazo Dyes with Glucose: A General Synthesis of 2-Aryl-2H-benzotriazole 1-Oxides

The reduction of some representative o-nitrophenylazo dyes in ethanolic alkali with glucose gives the corrsponding 2-aryl-2H-benzotriazole 1-oxides in excellent yield.These 1-oxides are rapidly reduced to the parent benzotriazoles at room temperature by means of zinc dust/ethanolic alkali.This method provides a convenient preparation for 5-chlorobenzotriazoles, which are otherwise readily dechlorinated by zinc dust under more vigorous conditions