4-Methyl-3-nitrobenzonitrile is an aromatic compound that carries three distinct functional groups on a single benzene ring: a nitrile, a nitro group, and a methyl group. The presence of three substituents with complementary chemical behaviour makes this material a highly productive building block in the organic synthesis laboratory. The nitrile group can be converted into a carboxylic acid, an amide, an amine, or a tetrazole; the nitro group can be reduced to an aromatic amine; and the methyl group positioned next to the nitro group opens a route to indole ring formation through a well-established classical reaction sequence.
The reason this material is so frequently selected lies in the strategic arrangement of its substituents. The ortho relationship between the methyl group and the nitro group is a prerequisite for Leimgruber-Batcho type indole synthesis, a pathway widely used to construct substituted indole frameworks. In addition, the nitro and nitrile groups are both electron-withdrawing, activating the ring towards nucleophilic aromatic substitution at specific positions and giving researchers additional functionalisation options. The three groups can also be addressed in stages by choosing orthogonal reaction conditions, so that a single starting material can serve several synthetic directions.
In Indonesian laboratories, this compound is typically used in organic synthesis research groups at universities and in research and development units that build substituted aromatic and heterocyclic scaffolds. It suits multi-step synthesis work where a single intermediate must support several downstream transformations, and it is commonly handled in small to moderate quantities on the bench, where the chemistry is developed first on a laboratory scale before any further scale-up is considered.
- Leimgruber-Batcho indole synthesis, where the ortho methyl and nitro arrangement provides exactly the substitution pattern required to close the indole ring system.
- Nitrile transformation chemistry, since the cyano group can be converted to carboxylic acids, amides, amines, or tetrazoles depending on the reaction conditions selected by the chemist.
- Aromatic amine preparation through reduction of the nitro group, giving access to aniline-type intermediates that carry a retained nitrile handle for later steps.
- Nucleophilic aromatic substitution studies, because the combined electron-withdrawing effect of the nitro and nitrile groups activates the ring at defined positions.
- Multi-step scaffold construction, where the three functional groups are addressed sequentially under orthogonal conditions so one starting material supports several synthetic routes.
| Brand | TCI |
|---|---|
| CAS number | 939-79-7 |
| Molecular formula | — |
| Purity | — |
| Category | Chemistry > Building Blocks > Non-Heterocyclic Building Blocks |
| Pack sizes | available in standard laboratory research pack sizes; please confirm the option required |
| Physical form | — |
| Storage | store in a cool, dry place in a tightly closed container, away from light |
- Catalogue code: M1946
Store the container tightly closed in a cool, dry, and well-ventilated area, protected from direct sunlight and away from heat sources, ignition sources, and incompatible materials such as strong oxidising agents, strong bases, and reducing agents. Keep the product in its original supplier container or in a chemically compatible, clearly labelled vessel. All handling, weighing, and transfer operations should be carried out in a fume hood using appropriate personal protective equipment, including safety goggles, chemically resistant gloves, and a laboratory coat. Avoid inhalation of dust and any contact with skin or eyes, and always consult the manufacturer's Safety Data Sheet before use.
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