The efficacy of modern pharmaceuticals hinges on the precise synthesis of complex molecules, where each intermediate plays a crucial role. D-4-Hydroxyphenylglycine Methyl Ester Hydrochloride (CAS 57591-61-4) is a prime example of such a vital chemical intermediate, particularly indispensable in the pharmaceutical industry for the production of antibiotics like Amoxicillin. Understanding its chemical properties and synthesis pathways can shed light on why its quality and availability are so critical for downstream manufacturing processes.

Chemically, D-4-Hydroxyphenylglycine Methyl Ester Hydrochloride is a hydrochloride salt derivative of D-4-hydroxyphenylglycine. Its molecular formula is C9H12ClNO3, with a molecular weight of 217.65. The hydrochloride form enhances its stability and handling characteristics, making it a preferred choice for chemical synthesis. The 'D-' designation refers to its specific stereochemistry, which is vital for its biological activity when incorporated into larger drug molecules. In the synthesis of Amoxicillin, this specific chiral center is essential for the antibiotic's mechanism of action.

The synthesis of D-4-Hydroxyphenylglycine Methyl Ester Hydrochloride itself involves careful chemical reactions. Sources indicate common methods involve esterification of D-4-hydroxyphenylglycine with methanol in the presence of reagents like thionyl chloride or hydrochloric acid. Achieving high purity, typically above 99%, is a key objective during its manufacturing. This purity ensures that subsequent reactions, such as the coupling with 6-aminopenicillanic acid (6-APA) to form Amoxicillin, proceed efficiently with minimal side reactions or the generation of unwanted byproducts. High-grade intermediates contribute directly to higher yields and better quality of the final API.

Furthermore, D-4-Hydroxyphenylglycine Methyl Ester Hydrochloride is recognized for its utility beyond Amoxicillin. Its structure makes it a valuable component in the synthesis of antiviral peptides and other fine chemicals used in pharmaceutical research and development. Companies that manufacture this intermediate emphasize its quality standards, often backed by certifications and adherence to international pharmacopeias. For those involved in chemical synthesis, sourcing this compound from reliable suppliers, such as those in China, offers access to high-quality materials that can streamline production processes and enhance the overall efficiency of pharmaceutical manufacturing. The consistent quality of D-4-Hydroxyphenylglycine Methyl Ester Hydrochloride is a testament to the precision required in chemical synthesis and its critical role in delivering essential medicines.