4-Bromo-3-fluoroiodobenzene
CAS Number 136434-77-0
Chemistry Building Blocks, Fluorinated Building Blocks, Materials, MonomersA versatile multi-halogenated building block
Utilised as a synthesis intermediate for carbazole derivatives, APIs and liquid crystals
Specifications | MSDS | Literature and Reviews
4-Bromo-3-fluoroiodobenzene (CAS number 136434-77-0), is a multi-halogenated benzene derivative with an iodide, a fluoride and a bromide at 1-, 3- and 4-positions, respectively. 4-Bromo-3-fluoroiodobenzene serves as a molecular scaffold due to its three distinct substituents. The fluoride group is favourable for nucleophilic aromatic substitution, i.e. nucleophilic displacement of the fluorine atom with the amine derivative, creating a substituted aryl amine bond. The iodide and bromide functional groups are preferred in metal-catalysed cross-coupling reactions. Additionally, iodide exhibits higher reaction rate during the catalytic reaction compared to the bromide substituent.
Selective factor Xa inhibitors (7-fluoroindazole derivatives) are synthesised from 4-bromo-3-fluoroiodobenzene. The resulting Xa inhibitors exhibit highly selective potency of 5.2 nM.
Multiple functional groups
For facile synthesis
Fluorinated iodobenzene building block
For drug discovery, liquid crystals, and carbazole derivatives
Low Cost
Competitively priced, high quality product
High purity
>98% High purity
General Information
CAS Number | 136434-77-0 |
Chemical Formula | C6H3BrFI |
Full Name | 1-Bromo-2-fluoro-4-iodobenzene |
Molecular Weight | 300.90 g/mol |
Synonyms | 2-Bromo-4-fluoroiodobenzene |
Classification / Family | Fluorinated building blocks, Aromatic building blocks, APIs, Liquid crystals, Carbazole derivatives |
Chemical Structure

Product Details
Purity | 98% |
Melting Point | Tm = 34 °C – 38 °C |
Appearance | White crystals |
MSDS Documentation
4-Bromo-3-fluoroiodobenzene MSDS Sheet
Literature and Reviews
- 7-Fluoroindazoles as potent and selective inhibitors of factor Xa, Y.-K. Lee et al., J. Med. Chem., 51, 282–297 (2008); DOI: 10.1021/jm701217r.
- Synthetic advantages of defluorinative C-F bond functionalization, L. Hooker et al., Angew. Chem. Int. Ed., e202308880 (2023); DOI: 10.1002/anie.202308880.
- Copper/β-diketone-catalysed N-arylation of carbazoles, F. Chen et al., RSC Adv., 5, 51512–51523 (2015); DOI: 10.1039/C5RA07690K.