1-(4-Chlorobenzoyl)-1H-benzotriazole
1-(4-Chlorobenzoyl)-1H-benzotriazole (CAS 4231-70-3; C13H8ClN3O; molar mass 257.68 g/mol) is a crystalline N-acylbenzotriazole used as a stable, easily handled acylating reagent in organic synthesis. The benzotriazole acts as a leaving group, allowing the 4-chlorobenzoyl moiety to be transferred under mild conditions. It is widely used as a building block for amides, 1,2-diketones and related carbon-carbon bond-forming reactions. Tech Serve Solutions supplies it as a research-grade reagent for laboratory and process chemistry.
- IUPAC
- 1H-Benzotriazol-1-yl(4-chlorophenyl)methanone
- Synonyms
- 1-(4-Chlorobenzoyl)-1H-benzotriazole1H-Benzotriazol-1-yl(4-chlorophenyl)methanone(4-Chlorophenyl)(1H-benzotriazol-1-yl)methanone1-(4-Chlorobenzoyl)benzotriazoleN-(4-Chlorobenzoyl)benzotriazole4-Chlorobenzoyl benzotriazole
Benzoylating reagent for amide synthesis
Serves as a bench-stable N-acylbenzotriazole that acylates amines to form the corresponding amides under mild conditions. The benzotriazolide is a convenient alternative to acyl chlorides for introducing the 4-chlorobenzoyl group.
Synthesis of 1,2-diketones
Used in the coupling of N-acylbenzotriazoles to access 1,2-diketones. This makes it a useful reagent for constructing functionalised carbonyl frameworks in synthetic chemistry.
Carbon-carbon bond formation and building block
Acts as a heterocyclic building block in carbon-carbon bond-forming reactions and broader chemical synthesis. The activated acyl group enables controlled transfer of the aroyl unit to a range of nucleophiles.
Acylation and phenylation reactions
Applied as a reactant in acylation chemistry, including the acylation of sodium azide and the preparation of diketone oximes by phenylation. It also features in gas-phase thermolysis and chemoselective reduction studies.
Research and process reagent
Suited to medicinal-chemistry, methodology and process-development laboratories that require a defined-purity benzotriazole acylating agent. Supplied as a research-grade reagent rather than to any pharmacopoeial standard.
| Molecular weight | 257.68 |
|---|---|
| Empirical formula | C13H8ClN3O |
| Assay | 97% |
| Application | Reactant for: • Acylation of sodium azide with N-acylbenzotiazoles1• Gas-phase thermolysis2• Chemoselective reduction3Reactant for synthesis of: • Diketone oximes by phenylation4• Amides by acylation of amines5• 1,2-Diketones by coupling of N-acylbenzotriazoles6 |
| Melting point | 135-139 °C(lit.) |
Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 1-(4-Chlorobenzoyl)-1H-benzotriazole used for?
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It is used as a stable N-acylbenzotriazole acylating reagent in organic synthesis. Typical uses include the acylation of amines to form amides, the preparation of 1,2-diketones by coupling of N-acylbenzotriazoles, and carbon-carbon bond-forming reactions where the 4-chlorobenzoyl group is transferred under mild conditions.
What is the CAS number and molecular formula of 1-(4-Chlorobenzoyl)-1H-benzotriazole?
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The CAS number is 4231-70-3 and the molecular formula is C13H8ClN3O, with a molecular weight of 257.68 g/mol. Its MDL number is MFCD00475616. It is also known as 1H-Benzotriazol-1-yl(4-chlorophenyl)methanone.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1-(4-Chlorobenzoyl)-1H-benzotriazole at a typical assay of 97% as a research/technical-grade reagent. It is a crystalline solid with a reported melting point of 135-139 °C. We do not represent this material as USP, BP or EP pharmacopoeial grade. A certificate of analysis can be provided with each batch.
What are the safety and handling requirements?
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This product is classified under GHS07 with the signal word Warning. The hazard statements are H315 (causes skin irritation), H319 (causes serious eye irritation) and H335 (may cause respiratory irritation). Handle with gloves, eye protection and an N95-type dust mask, avoid generating dust, and consult the Safety Data Sheet before use. Its German Water Hazard Class (WGK) is 3.
How is 1-(4-Chlorobenzoyl)-1H-benzotriazole packed, shipped and exported?
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It is packed as a solid in tightly sealed containers sized to the order, from research quantities to bulk, with full labelling and documentation. As a global supplier and exporter since 1998, Tech Serve Solutions arranges compliant international shipping with a Safety Data Sheet and certificate of analysis. Packaging and transport classification are confirmed at the time of order.
How do I request a sample or quote?
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Contact Tech Serve Solutions with the product name or CAS number 4231-70-3, your required quantity and destination, and we will respond with availability, lead time and a quotation. Samples can be arranged for evaluation where appropriate.
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