4-Ethylphenylboronic acid
4-Ethylphenylboronic acid (CAS 63139-21-9, C₂H₅C₆H₄B(OH)₂) is an organoboron compound with a molar mass of 149.98 g/mol. This aryl boronic acid serves as a key building block in organic synthesis. Its primary application lies in its role as a reactant in Suzuki-Miyaura cross-coupling reactions, facilitating the formation of carbon-carbon bonds in the synthesis of complex organic molecules.
- IUPAC
- (ρ-Ethylphenyl)boronic acid,4-Ethylbenzeneboronic acid
- Synonyms
- (ρ-Ethylphenyl)boronic acid4-Ethylbenzeneboronic acid

Suzuki-Miyaura Cross-Coupling Reactions
4-Ethylphenylboronic acid is a valuable reagent for Suzuki-Miyaura cross-coupling reactions. This catalytic reaction is widely employed in organic synthesis for constructing carbon-carbon bonds, essential for building complex molecular structures.
Organic Synthesis Intermediate
As an aryl boronic acid derivative, it functions as a versatile intermediate in the synthesis of various organic compounds. Its structure allows for targeted functionalization and elaboration into more complex molecular architectures.
Pharmaceutical Research
This compound finds application in pharmaceutical research and development. It can be utilized in the synthesis of novel drug candidates and intermediates, contributing to the discovery of new therapeutic agents.
| Molecular weight | 149.98 |
|---|---|
| Linear formula | C2H5C6H4B(OH)2 |
| Application | Reactant for:• Suzuki-Miyaura cross-coupling reactions1,2,3,4 |
| Melting point | 150-155 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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 4-Ethylphenylboronic acid used for?
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4-Ethylphenylboronic acid is primarily used as a reactant in Suzuki-Miyaura cross-coupling reactions for the synthesis of complex organic molecules, particularly in pharmaceutical research and organic synthesis.
What are the CAS number and formula for 4-Ethylphenylboronic acid?
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The CAS number for 4-Ethylphenylboronic acid is 63139-21-9, and its linear formula is C₂H₅C₆H₄B(OH)₂.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Ethylphenylboronic acid as a research-grade chemical. The specific assay and purity are detailed on the Certificate of Analysis available upon request. TSS does not represent this product as USP, BP, EP, or for food or pharmaceutical use.
What are the safety and handling precautions for 4-Ethylphenylboronic acid?
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Handling 4-Ethylphenylboronic acid requires appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter should be used. It carries a WGK Germany rating of 3, indicating a high hazard to water.
How is 4-Ethylphenylboronic acid shipped and exported?
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Tech Serve Solutions, a specialist global supplier and exporter, provides 4-Ethylphenylboronic acid for research and manufacturing purposes worldwide. Packaging and shipping comply with international regulations for chemical transport.
How can I request a sample or quote for 4-Ethylphenylboronic acid?
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To request a sample or obtain a quote for 4-Ethylphenylboronic acid, please contact our sales department via the website or by phone, providing your specific requirements.
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