4-Ethynylbenzoic acid
4-Ethynylbenzoic acid (CAS: 10602-00-3) is a specialized organic building block that features both a carboxylic acid group and a terminal alkyne functional group attached to a benzene ring at the para position. This unique bifunctional structure makes it an essential intermediate in the field of organic synthesis, enabling the creation of complex molecular frameworks through various chemical transformations. The compound is typically supplied as a high-purity off-white to yellow powder, suitable for use in both laboratory research and industrial-scale chemical manufacturing. Its stability and well-defined chemical properties allow for precise control in synthetic pathways.
The compound is particularly recognized for its utility in the development of advanced materials. By leveraging the reactivity of the ethynyl group, chemists can synthesize rigid, conjugated molecules that are vital for the production of electronic materials, liquid crystals, and specialized polymers. Furthermore, the carboxylic acid moiety provides a site for coordination or esterification, extending the compound’s versatility. As a result, 4-Ethynylbenzoic acid is a preferred choice for researchers working on metal-organic frameworks and other supramolecular structures where structural integrity and functional diversity are paramount.
• Utilized as a fundamental building block in palladium-catalyzed Sonogashira coupling reactions, allowing for the efficient introduction of the 4-carboxyphenyl moiety into a wide range of organic substrates to form rigid, linear molecular structures suitable for molecular electronics and photonics.
• Acts as a critical organic linker in the synthesis of Metal-Organic Frameworks (MOFs) and Covalent Organic Frameworks (COFs), where its rigid geometry and dual functionality contribute to the formation of highly porous and stable crystalline materials used in gas storage, separation, and heterogeneous catalysis.
• Employed extensively in the material sciences for the preparation of functionalized polymers, liquid crystals, and self-assembled monolayers, where the terminal alkyne group can be further modified via copper-catalyzed click chemistry or oxidative coupling to tailor the optical, electronic, and mechanical properties.
• Serves as a key intermediate in the pharmaceutical and agrochemical industries for the development of drug candidates and bioactive molecules, providing a versatile scaffold that can be easily modified to explore structure-activity relationships and enhance the pharmacological profile of target compounds.
Product Name: 4-Ethynylbenzoic acid
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