56750-11-9

Upstream product

• 22617-04-5 2-<(4-Chloro-2-nitrophenyl)azo>-6-(1,1-dimethylethyl)-4-methylphenol 
• 22617-04-5 2-nitro-4-chloro-2'-hydroxy-3'-tert-butyl-5'-methylazobenzene 
• 89-63-4 4-Chloro-2-nitroaniline 
• 2409-55-4 2-tert-Butyl-4-methylphenol 

Downstream Products

• 23939-33-5 2-(2-hydroxy-3-tert-butyl-5-methylphenyl)-2H-benzotriazole 
• 3896-11-5 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-2H-5-chlorobenzotriazole 

Relevant academic research and scientific papers

Preparation of 2-(2H-Benzotriazol-2-yl)phenols by the Reduction of 2-phenols with Thiourea S,S-Dioxide

The reduction of 2-phenols 1 with thiourea S,S-dioxide and sodium hydroxide in a mixture of isopropyl alcohol and water at reflux provides 2-(2H-benzotriazol-2-yl)phenols 3 in excellent yields.

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