2766-64-5

Basic information

• Product Name: 2,3,5,6-TETRABROMOPYRIDINE
• Synonyms: 2,3,5,6-TETRABROMOPYRIDINE
• CAS NO: 2766-64-5
• Molecular Formula: C₅HBr₄N
• Molecular Weight: 394.68
• Mol File: 2766-64-5.mol
• Article Data: 4

Chemical Properties

• Melting Point: 102-103 °C
• Boiling Point: 334.3±37.0 °C(Predicted)
• Appearance: /
• Density: 2.677±0.06 g/cm3(Predicted)
• PKA: -8.36±0.20(Predicted)
• CAS DataBase Reference: 2,3,5,6-TETRABROMOPYRIDINE(CAS DataBase Reference)
• NIST Chemistry Reference: 2,3,5,6-TETRABROMOPYRIDINE(2766-64-5)
• EPA Substance Registry System: 2,3,5,6-TETRABROMOPYRIDINE(2766-64-5)

Safety Data

• Hazardous Substances Data: 2766-64-5(Hazardous Substances Data)

Usage

General Description

2,3,5,6-tetrabromopyridine is an organic compound that consists of a pyridine ring with four bromine atoms attached at the 2nd, 3rd, 5th, and 6th positions. It is a highly toxic and irritating chemical that is primarily used as a building block in the synthesis of pharmaceuticals and agrochemicals. Its chemical properties make it suitable for applications in the production of flame retardants, which are used in the manufacturing of textiles, electronics, and construction materials to reduce the flammability of these products. However, 2,3,5,6-tetrabromopyridine has been identified as a persistent organic pollutant with potential harmful effects on the environment and human health, leading to increasing regulatory restrictions on its use and production.

Upstream product

• 626-05-1 2,6-Dibromopyridine 
• 1121-89-7 piperidine-2,6-dione 
• 109-04-6 2-bromo-pyridine 
• 19798-81-3 2-Amino-6-bromopyridine 
• 408352-48-7 2-amino-4,6-dibromopyridine 
• 2408-70-0 2,4,6-tribromopyridine 
• 873383-11-0 6-bromo-1-methyl-1,2-dihydropyridin-2-one 
• 625-92-3 3,5-dibromopyridine 
• 7726-95-6 bromine 
• 7789-69-7 phosphorus pentabromide 
• 7789-60-8 phosphorus tribromide 
• 76942-20-6 2,6-diamino-3,5-dibromopyridine 
• 141-86-6 2.6-diaminopyridine 
• 63875-38-7 3,5,6-tribromopyridin-2-amine 

Downstream Products

• 118555-06-9 3,5-dibromo-2,6-diphenoxypyridine 

Relevant articles and documents

Synthesisandpropertiesof5,7-Dihydropyrido[3,2-b:5,6-b′]diindoles

5,7-Dihydropyrido[3,2-b:5,6-b]diindoles were prepared by a highly efficient two-step synthesis that involved a site-selective Suzuki coupling reaction of 2,3,5,6-etrabromopyridine and a subsequent Pd-catalyzed cyclization that proceeded through a twofold C-N coupling reaction with aromatic and aliphatic amines. With the exception of the parent molecule, which was described in a patent without any characterization data, the 5,7-dihydropyrido[3,2-b:5,6-b]diindoles are a new chemical entity. Their electrochemical and photochemical properties were investigated. These pyridodiindoles show promising fluorescence properties with good quantum yields and interesting electrochemical behavior. The optical and electronical properties were analyzed and explained by using DFT calculations.

SYNTHESIS OF PHENOXYPYRIDINES UNDER PHASE TRANSFER CATALYSIS CONDITIONS

Reactions of halopyridines with alkali metal phenoxides in a two phase liquid-solid catalytic system, rather than in a liquid-liquid phase transfer catalytic system, make it possible to prepare 2-, 3-, and 4-phenoxypyridines from unactivated bromo- or chloropyridines and 2-chloropicolines.In polyhalogenated pyridines only α- and γ-halogen atoms undergo substitution. 7,8-Dibromo-6-azaphenoxane has been prepared by the reaction of 2,3,5,6-tetrabromopyridine with the dipotassium salt of pyrocatechol.