1,2,3,4-Tetrahydrocyclopent[b] indole
1,2,3,4-Tetrahydrocyclopent[b]indole (CAS: 2047-91-8) is a chemical compound with the molecular formula C11H11N. It functions as a valuable building block in organic synthesis. This indole derivative is particularly useful as a reactant in specific functionalization reactions and in the preparation of oxidising agents, contributing to advancements in chemical synthesis and the development of novel compounds.
- IUPAC
- 2,3-Trimethyleneindole,NSC 112674
- Synonyms
- 4-Tetrahydrocyclopent[b] indole2,3-TrimethyleneindoleNSC 112674
![1,2,3,4-Tetrahydrocyclopent[b] indole (C11H11N) — chemical structure, CAS 2047-91-8; Chemistry, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F2047-91-8.png&w=3840&q=75)
Organic Synthesis Reactant
Serves as a key reactant in thionium species-mediated functionalization reactions specifically at the 2α-position of indoles.
Precursor for Oxidants
Utilised in the preparation of tetramethylpiperidine-1-oxoammonium salts, which are employed as oxidising agents in various chemical processes.
Heterocyclic Building Block
A versatile intermediate for constructing more complex heterocyclic structures within medicinal chemistry and materials science.
| Molecular weight | 157.21 |
|---|---|
| Empirical formula | C11H11N |
| Assay | 96% |
| Application | • Reactant for thionium species-mediated functionalization at the 2α-position of indoles1• Reactant for preparation of tetramethylpiperidine-1-oxoammonium salts as oxidants2 |
| Melting point | 100.5-105.5 °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 | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| 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 1,2,3,4-Tetrahydrocyclopent[b]indole used for?
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This compound is primarily used as a reactant in specific indole functionalisation reactions and as a precursor for preparing oxidising agents like tetramethylpiperidine-1-oxoammonium salts.
What is the CAS number and formula for 1,2,3,4-Tetrahydrocyclopent[b]indole?
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The CAS number is 2047-91-8, and its molecular formula is C11H11N.
What is the grade or purity of this chemical?
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This product is supplied at an assay of 96%.
What are the main hazards associated with 1,2,3,4-Tetrahydrocyclopent[b]indole?
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Based on GHS information, this compound is classified as a Warning. It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335).
How is 1,2,3,4-Tetrahydrocyclopent[b]indole packed and exported?
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As a global supplier, Tech Serve Solutions ensures appropriate packaging for safe handling, shipping, and international export of this chemical.
How can I request a quote for 1,2,3,4-Tetrahydrocyclopent[b]indole?
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To request a quote, please use the 'Add to Quote' button on our product page or contact our sales team directly with your requirements.
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