The development of effective antibacterial agents is a cornerstone of modern medicine. Behind many critical drugs lies a complex chain of chemical synthesis, where specific intermediate compounds are vital. This article focuses on 3,4,5-Trimethoxybenzaldehyde (CAS 86-81-7), a fundamental organic intermediate whose unique chemical structure is indispensable for the production of trimethoprim, a widely used antibacterial synergist. For R&D scientists and procurement specialists in the pharmaceutical sector, understanding the chemistry and supply of this compound is key.

3,4,5-Trimethoxybenzaldehyde: A Key Building Block

3,4,5-Trimethoxybenzaldehyde (CAS 86-81-7) is an aromatic aldehyde characterized by its three methoxy groups attached to a benzaldehyde core. Its molecular formula is C10H12O4, and it typically appears as a white to creamy powder with a melting point around 72-74°C. This compound’s chemical reactivity makes it an ideal starting material or intermediate in multi-step organic syntheses.

The most significant application of 3,4,5-Trimethoxybenzaldehyde is in the synthesis of trimethoprim. Trimethoprim is a dihydrofolate reductase inhibitor, which means it interferes with the synthesis of nucleic acids and proteins in bacteria. When combined with sulfonamides (like sulfamethoxazole), it creates a powerful synergistic effect, significantly enhancing its antibacterial potency. This combination is effective against a broad range of Gram-positive and Gram-negative bacteria, commonly used in treating urinary tract infections, respiratory infections, and other bacterial diseases. Therefore, the availability of high-purity 3,4,5-Trimethoxybenzaldehyde from reliable manufacturers is critical for consistent trimethoprim production.

The Synthesis Pathway Simplified

While the exact synthesis routes can vary and involve proprietary processes, a common approach to synthesizing trimethoprim starts with 3,4,5-Trimethoxybenzaldehyde. The aldehyde group undergoes condensation reactions to build the pyrimidine ring structure characteristic of trimethoprim. The methoxy groups on the benzene ring are essential for the molecule’s interaction with the target enzyme in bacteria.

For those looking to buy 3,4,5-Trimethoxybenzaldehyde, sourcing it from reputable manufacturers ensures the necessary purity (≥99%) and consistent quality required for pharmaceutical synthesis. A reliable supplier will provide comprehensive documentation and a stable supply chain, critical for uninterrupted production.

We are a dedicated supplier of high-quality chemical intermediates, including 3,4,5-Trimethoxybenzaldehyde (CAS 86-81-7). Our products are manufactured to meet stringent industry standards, making them ideal for pharmaceutical applications. We understand the importance of this compound in creating effective antibacterial agents like trimethoprim.

If your research or manufacturing requires 3,4,5-Trimethoxybenzaldehyde, we encourage you to request a quote. We offer competitive pricing and a commitment to quality, ensuring you receive a product that meets your exact specifications for synthesizing essential antibacterial medicines.