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Description
TCI D3443 3,5-Difluorobenzyl Cyanide is a fluorinated building block featuring two fluorine atoms arranged symmetrically at the meta positions relative to the acetonitrile side chain. This symmetry sets it apart from other difluoro isomers, because both sides of the aromatic ring become equivalent, which simplifies the interpretation of spectroscopic data and reduces the likelihood of regioisomeric mixtures forming in subsequent reactions on the ring. In the laboratory, the compound serves as a starting material for constructing the 3,5-difluorophenyl fragment that is frequently encountered in drug molecules, active ingredient candidates, and research probe compounds.
The principal characteristics of this material arise from the two electron-withdrawing fluorine atoms, which are sterically remote from the side chain yet still exert a strong electronic influence through the inductive effect. As a result, the protons on the benzylic carbon become more acidic and are more readily deprotonated for alkylation reactions, while the aromatic ring becomes less reactive toward electrophilic attack. The presence of fluorine also increases the molecule's resistance to metabolic oxidation at the aromatic positions, a rationale frequently cited in modern drug design. The nitrile group completes this profile as a versatile functional handle for further transformation.
In Indonesian laboratories, this building block is typically used in synthetic organic chemistry groups at universities and research institutes, as well as in pharmaceutical and agrochemical research units working on fluorinated intermediates. It is commonly handled on a small scale during route development and medicinal chemistry exploration, where the reliability of a well-characterized starting material matters more than bulk quantity. Analytical and method development laboratories may also use it as a defined reference substrate when validating chromatographic or spectroscopic procedures.
Laboratory Applications
Medicinal chemistry intermediate synthesis: the symmetric 3,5-difluorophenyl fragment it delivers appears widely in drug molecules and active ingredient candidates, giving chemists direct access to a metabolically stabilized aromatic core.
Benzylic alkylation reactions: the acidified benzylic protons are readily deprotonated by suitable bases, allowing controlled carbon–carbon bond formation and construction of branched side chains from a single, well-defined starting material.
Nitrile group transformation chemistry: the cyano function acts as a versatile handle that can be elaborated further, letting laboratories build diverse functional groups without needing to redesign the fluorinated aromatic portion of the molecule.
Research probe compound preparation: laboratories developing probe molecules value the defined substitution pattern, since ring symmetry lowers the risk of regioisomeric by-products and simplifies purification and structural confirmation of the products.
Spectroscopic method development and structural studies: the equivalent aromatic positions produced by the symmetric difluoro arrangement yield simpler spectra, making this compound a convenient substrate for teaching, method validation, and analytical comparison work.
Specifications
Brand: TCI
CAS Number: 122376-76-5
Product Code: D3443
Chemical Name: 3,5-Difluorobenzyl Cyanide
Category: Chemistry > Building Blocks > Fluorinated Building Blocks
Pack sizes: available in standard research-scale laboratory pack sizes as supplied by the manufacturer; storage according to the manufacturer's label and safety data sheet
Handling and Storage
Store this fluorinated building block in a cool, dry, and well-ventilated area, kept tightly closed in its original manufacturer container to prevent moisture uptake and contamination. Amber glass or the supplied packaging is suitable for maintaining material integrity, and containers should be kept away from strong oxidizing agents, strong bases, and sources of heat or ignition. All handling should take place in a properly functioning fume hood, using nitrile gloves, safety goggles, and a laboratory coat, since nitrile-containing compounds require careful exposure control. Avoid inhalation of vapors and any direct skin or eye contact. Always consult the manufacturer's safety data sheet before use, and dispose of residues and contaminated materials through the laboratory's chemical waste stream in accordance with applicable regulations.
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