TCI D3937 2',4'-Dichloropropiophenone is an aromatic ketone built on a propiophenone framework carrying two chlorine atoms at the 2' and 4' positions of the benzene ring. In organic synthesis laboratories, this compound serves as a non-heterocyclic building block — an intermediate that supplies a ready-made aryl ketone skeleton for further modification. The carbonyl group acts as the principal reaction centre, while the chlorinated aromatic ring imparts a distinct electronic character that influences both the rate and the direction of subsequent steps in a multi-step synthetic sequence.
The characteristics that make this compound a preferred choice begin with the two electron-withdrawing chlorine atoms, which increase the electrophilicity of the carbonyl group and facilitate nucleophilic attack. In addition, the alpha hydrogen atoms on the propanone chain can be deprotonated or halogenated, opening routes to a range of transformations such as heterocyclic ring formation, alkylation, and condensation. The chlorine substituents at the ortho and para positions likewise provide handles for aromatic substitution or cross-coupling reactions at later stages, while increasing the lipophilicity of the final product — a property frequently sought in synthetic work.
In Indonesian laboratories, TCI D3937 is typically used in organic synthesis and research settings where an aryl ketone intermediate is required as a starting point for building larger molecular structures. It is handled in university research groups, institutional chemistry laboratories, and industrial R&D units that carry out multi-step preparations. Because it is supplied as a defined building block from TCI, it fits routine bench-scale work where a consistent, well-characterised aromatic ketone intermediate is needed for method development and scale-up trials.
- Multi-step organic synthesis: the aryl ketone skeleton provides a defined starting framework that can be extended through sequential transformations toward more complex target molecules.
- Heterocyclic ring construction: the alpha hydrogen atoms on the propanone chain can be deprotonated or halogenated, allowing cyclisation reactions that build heterocyclic systems from this non-heterocyclic precursor.
- Nucleophilic addition chemistry: the two electron-withdrawing chlorine atoms raise the electrophilicity of the carbonyl group, making the compound a responsive substrate for nucleophilic attack.
- Cross-coupling and aromatic substitution studies: the ortho and para chlorine substituents serve as reactive handles for coupling or substitution reactions carried out at later stages of a synthetic route.
- Condensation and alkylation reactions: the acidic alpha positions adjacent to the carbonyl group support enolate-based alkylation and condensation chemistry commonly used in intermediate preparation.
| Brand | TCI (Tokyo Chemical Industry), catalogue code D3937 |
|---|---|
| CAS number | 37885-41-9 |
| Molecular formula | — |
| Purity | — |
| Category | Chemistry > Building Blocks > Non-Heterocyclic Building Blocks |
| Pack sizes | available in standard TCI laboratory research pack sizes; please confirm the required packaging when ordering |
| Physical form | — |
| Storage | keep in the tightly closed original container, protected from moisture and direct light |
- Chemical class: aromatic ketone; propiophenone framework chlorinated at the 2' and 4' ring positions
Store TCI D3937 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and ignition sources, keeping the container tightly closed to limit contact with atmospheric moisture. The original manufacturer packaging is the most suitable container; if transferred, use chemically compatible, clearly labelled glass or approved containers. Handle inside a fume hood and wear standard personal protective equipment, including safety goggles, a laboratory coat, and chemically resistant gloves. Avoid inhalation of dust or vapour and avoid contact with skin and eyes. Keep the material separated from strong bases, strong oxidising agents, and incompatible reagents. Always consult the manufacturer's Safety Data Sheet before use, and dispose of residues and contaminated materials through the laboratory's chemical waste procedures.
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