67643-51-0

Upstream product

• 537-92-8 3-Methylacetanilide 
• 860753-33-9 1,5-dibromo-2-methyl-4-nitrobenzene 
• 108-44-1 1-amino-3-methylbenzene 
• 6933-10-4 amino-5-bromo-2-toluene 
• 31543-75-6 2,4-dibromotoluene 
• 36789-29-4 N-(2,4-dibromo-5-methylphenyl)acetamide 
• 7647-01-0 hydrogenchloride 

Downstream Products

• 13321-76-1 2,4-dibromo-5-methylphenol 
• 31543-75-6 2,4-dibromotoluene 
• 3278-88-4 2,4,5-tribromotoluene 
• 36789-29-4 N-(2,4-dibromo-5-methylphenyl)acetamide 
• 611-00-7 2,4-dibromobenzoic acid 

Relevant academic research and scientific papers

Method of catalytically synthesizing polybromo-aniline in water phase

The invention discloses a method of catalytically synthesizing polybromo-aniline in a water phase. The method comprises following steps: adding a catalytic amount of a free radical initiator, aniline derivatives, cheap and low-toxic bromine salts, and water into a reactor; carrying out reactions in a photocatalytic reaction instrument under power of 5W at a room temperature; after a while, extracting the reaction product by ethyl acetate, and carrying out recrystallization to obtain polybromo-aniline; wherein the free radical initiator is eosin, sodium persulfate, or potassium persulfate. The power of the incandescent lamp of the photocatalytic reaction instrument is 5W. The free radical initiator and bromine salts are cheap and easily available. The method is an ideal synthesis method of polybromo-aniline. Cheap and low-toxic bromine salts are used to replace liquid bromine. The cheap and easily available free radical initiator is used to replace unstable and explosive hydrogen peroxide. After 4 to 10 hours of reactions under the power of 5W, polybromo-aniline can be synthesized, the yield and the reaction selectivity are high, the byproducts are few, and the post treatment is simple.

Preparation of carbazole and dibenzofuran derivatives by selective bromination on aromatic rings or benzylic groups with N-bromosuccinimide

N-Bromosuccinimide (NBS), a bromine source, has been used to study the bromination of toluidine and cresols systematically to clarify the underlying mechanism and the orientation effect. It has been found that bromination of toluidine and cresols which possess electron-donating NH2/OH with NBS gives electrophilic aromatic substitution products quickly instead of the desired benzylic bromination products. In contrast, when the electronic effect of the substituted groups is reversed, only the benzylic bromination products are gained. Based on this methodology, several potential AChE inhibitors, such as 2-methoxy-5-(benzylamino)methyl-dibenzofuran, 3-bromo-2-methoxy-5-methyl-9H- carbazole, 3,6-dibromo-2-methoxy-5-methyl-9H-carbazole, and 5-(bromomethyl)-2- methoxy-9H-(phenylsulfonyl)-carbazole have been synthesized.

BENZIMIDAZOLE ANTIVIRAL AGENTS

Provided are compounds of Formula (I) and (II) and pharmaceutically acceptable salts thereof, their pharmaceutical compositions, their methods of preparation, and their use for treating viral infections mediated by a member of the Flaviviridae family of viruses such as hepatitis C virus (HCV).