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Description
2-Chloro-4-nitrobenzonitrile from TCI, supplied under catalogue code C3122, is an aromatic compound that carries three functional groups at once — a nitrile, a nitro group, and a chlorine atom — on a single benzene ring. That combination makes it a highly versatile non-heterocyclic building block in the organic synthesis laboratory. Its principal role is to provide an electron-poor, strongly activated aromatic platform on which a wide range of downstream transformations can be carried out, allowing chemists to construct more elaborate molecular frameworks efficiently and with a minimum of preparatory steps.
The characteristic that makes this reagent so widely chosen is the strong electron-withdrawing effect exerted simultaneously by the nitro and the nitrile groups. Together they leave the ring chlorine highly susceptible to nucleophilic attack, so nucleophilic aromatic substitution with amines, alkoxides, or thiolates proceeds under far milder conditions than an ordinary aryl chloride would require. The nitro group itself can be reduced to the corresponding aniline, opening a route towards benzimidazoles, quinazolines, and other heterocyclic systems. The nitrile, in turn, can be hydrolysed to an amide or a carboxylic acid, reduced to an amine, or converted into a tetrazole.
In Indonesian laboratories this building block is typically used in university and institutional research groups working on organic synthesis and medicinal chemistry, as well as in industrial R&D units developing intermediates. It is generally handled at bench scale for exploratory route development, where a single reagent that offers several orthogonal points of derivatisation reduces the number of substrates that must be stocked. Its predictable reactivity also makes it a practical teaching and method-development substrate for postgraduate synthesis work.
Laboratory Applications
- Nucleophilic aromatic substitution studies: the dual activation by the nitro and nitrile groups lets the chlorine be displaced by amines, alkoxides, or thiolates under mild, easily controlled laboratory conditions.
- Heterocycle construction: reduction of the nitro group gives an aniline intermediate that can be cyclised onwards into benzimidazole, quinazoline, and related nitrogen heterocyclic scaffolds of research interest.
- Medicinal chemistry intermediate preparation: three orthogonal functional handles on one aromatic core allow rapid assembly of analogue series from a single, readily available starting material.
- Nitrile group transformations: the cyano substituent can be hydrolysed to an amide or carboxylic acid, reduced to an amine, or converted into a tetrazole ring.
- Synthetic route and methodology development: its predictable, strongly activated reactivity profile makes it a reliable model substrate for optimising reaction conditions before committing scarcer materials.
Specifications
- Brand: TCI, supplied under catalogue code C3122
- CAS number: 28163-00-0
- Chemical name: 2-Chloro-4-nitrobenzonitrile
- Category: Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
- Pack sizes: available in the standard TCI catalogue pack sizes; please confirm the required size when ordering
- Storage: keep in the closed original container in a cool, dry, well-ventilated place
Handling and Storage
Store the material in its original tightly closed container in a cool, dry, and well-ventilated area, away from direct sunlight, heat sources, moisture, and incompatible substances such as strong oxidising agents, strong bases, and strong reducing agents. Keep the container properly labelled and return it to storage promptly after weighing so that the contents are not left exposed to laboratory air. Handle the compound inside a fume hood using appropriate personal protective equipment, including safety goggles, chemical-resistant gloves, and a laboratory coat, and avoid generating or inhaling dust. Wash hands thoroughly after handling, and always consult the manufacturer's safety data sheet before use and for waste disposal guidance.
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