4-(Phenylethynyl)phenylboronic acid pinacol ester
Tech Serve Solutions offers 4-(Phenylethynyl)phenylboronic acid pinacol ester (CAS: 1190376-20-5), a valuable organoboron compound with the molecular formula C20H21BO2. This aryl boronate ester serves as a key building block in organic synthesis, particularly in cross-coupling reactions. Its structure facilitates the introduction of the phenylethynylphenyl moiety into complex molecules, making it useful in the development of novel materials and pharmaceutical intermediates.
- IUPAC
- 4,4,5,5-Tetramethyl-2-(4-phenylethynyl-phenyl)-[1,3,2]dioxaborolane
- Synonyms
- 4,4,5,5-Tetramethyl-2-(4-phenylethynyl-phenyl)-[1,3,2]dioxaborolane

Suzuki-Miyaura Cross-Coupling Reactions
4-(Phenylethynyl)phenylboronic acid pinacol ester is frequently employed as a coupling partner in Suzuki-Miyaura reactions. It enables the formation of new carbon-carbon bonds, facilitating the synthesis of conjugated systems and complex organic frameworks.
Organic Synthesis Intermediate
This compound functions as a versatile intermediate in the synthesis of advanced organic molecules. Its pinacol ester form offers enhanced stability and ease of handling compared to the free boronic acid, making it suitable for various synthetic pathways.
Materials Science Research
The phenylethynylphenyl unit can be incorporated into polymers and organic electronic materials. This ester serves as a precursor for synthesizing molecules with tailored optical and electronic properties for applications in research.
| Molecular weight | 304.19 |
|---|---|
| Empirical formula | C20H21BO2 |
| Assay | 97% |
| Melting point | 96-100 °C |
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-(Phenylethynyl)phenylboronic acid pinacol ester primarily used for?
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It is primarily used as a building block in organic synthesis, particularly for Suzuki-Miyaura cross-coupling reactions, and in materials science research for creating molecules with specific electronic and optical properties.
What is the CAS number and chemical formula?
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The CAS number is 1190376-20-5 and the chemical formula is C20H21BO2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this compound with an assay of 97%. We do not represent this product as USP, BP, EP, or pharmacopoeia grade.
What are the safety and handling considerations?
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This compound is classified under GHS07, indicating it may cause skin irritation, serious eye irritation, and respiratory irritation. Handle with appropriate personal protective equipment in a well-ventilated area.
Is this product available for international export?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including this product, serving customers worldwide.
How can I request a sample or a quote?
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Please contact our sales team directly via our website or by phone to request a sample or a quotation for this product.
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