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Description
TCI D3449 1,3-Dichloro-2-nitrobenzene (CAS 601-88-7) is a non-heterocyclic aromatic building block in which a nitro group sits between two chlorine atoms occupying the ortho positions on either side of it. This symmetrical arrangement makes the compound a classic starting material for nucleophilic aromatic substitution reactions, because the strongly electron-withdrawing nitro group activates both chlorine atoms toward attack by nucleophiles such as amines, alkoxides, thiolates, and other stabilised anions. In the laboratory, the compound is used to construct substituted aromatic rings that are subsequently elaborated into anilines, nitrogen-containing heterocycles, and a range of industrial intermediates.
The key characteristic that makes this compound valuable is its controllable, stepwise reactivity. Substitution of the first chlorine atom generally proceeds relatively easily, while displacement of the second chlorine requires more forcing conditions, allowing researchers to install two different nucleophiles sequentially on the same ring. The nitro group itself is not merely an activating substituent; once its activating role is complete, it can be reduced to an aromatic amine, opening pathways toward the formation of benzimidazoles, benzoxazoles, quinoxalines, and related fused-ring systems. This combination of predictable activation and downstream synthetic flexibility gives the material a broad role in multi-step preparative chemistry.
In Indonesian laboratories, TCI D3449 is typically used in synthetic organic chemistry groups at universities, research institutes, and industrial R&D units that build substituted aromatic and heterocyclic scaffolds. It serves as a reliable starting material for method development, small-scale route scouting, and the preparation of intermediates for further study, and is generally handled in standard glassware within a fume hood using routine reflux, stirring, and workup techniques familiar to bench-scale organic synthesis.
Laboratory Applications
- Nucleophilic aromatic substitution studies — the nitro group activates both flanking chlorine atoms, giving a dependable substrate for teaching and probing SNAr reaction mechanisms and kinetics under varied conditions.
- Sequential difunctionalisation of aromatic rings — the differing reactivity of the first and second chlorine allows two distinct nucleophiles to be installed in a controlled, stepwise order on one scaffold.
- Aniline intermediate preparation — after the nitro group has served its activating purpose, it can be reduced to an aromatic amine that carries the molecule into further transformations.
- Nitrogen-heterocycle construction — the resulting aromatic amines provide direct access to benzimidazole, benzoxazole, and quinoxaline frameworks widely pursued in medicinal and materials chemistry research.
- Industrial intermediate synthesis — the compound acts as a starting material for substituted aromatic intermediates that are elaborated further in applied and process-oriented laboratory work.
Specifications
- Brand: TCI (Tokyo Chemical Industry)
- CAS Number: 601-88-7
- Product Code: D3449
- Chemical Name: 1,3-Dichloro-2-nitrobenzene
- Category: Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
- Packaging: available in standard TCI research-scale pack sizes; please confirm the pack size when ordering
- Storage: keep in the tightly closed original container, in a cool, dry, well-ventilated place
Handling and Storage
Store TCI D3449 1,3-Dichloro-2-nitrobenzene in its tightly closed original container in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and incompatible materials such as strong reducing agents and strong bases. Keep the container closed when not in use to prevent moisture uptake and contamination, and return the material promptly to storage after weighing. Handle the compound inside a fume hood using appropriate personal protective equipment, including safety goggles, chemical-resistant gloves, and a laboratory coat, and avoid inhalation of dust and direct contact with skin or eyes. Use clean, dry spatulas and glassware, label all working solutions clearly, and collect residues and contaminated materials as chemical waste for disposal in accordance with institutional and local regulations. Always consult the manufacturer's Safety Data Sheet before use.
