3-Chlorophenylglycine, identified by CAS number 7292-71-9, is a compound that garners significant interest within the chemical and pharmaceutical industries. Understanding its fundamental chemical properties and common synthesis routes is crucial for both manufacturers and researchers looking to utilize it effectively. This article provides an overview of these aspects, highlighting why this molecule is a valuable asset in organic chemistry.

Chemical Identity and Properties

At its core, 3-Chlorophenylglycine is an alpha-amino acid derivative, featuring a phenyl ring substituted with a chlorine atom at the meta position, attached to an alpha-amino acetic acid structure. Its molecular formula is C8H8ClNO2, with a molecular weight of approximately 185.61 g/mol.

Key physical and chemical properties often cited include:

• Appearance: Typically presented as a white to off-white crystalline powder.
• Melting Point: Often reported around 268-269°C with decomposition, indicating thermal stability up to a certain point.
• Boiling Point: Approximately 316.9°C at 760 mmHg, though decomposition may occur before reaching this temperature.
• Density: Around 1.392 g/cm³.
• Solubility: It exhibits slight solubility in aqueous acids and very slight solubility in methanol, especially when heated. This limited solubility in common organic solvents is a characteristic that can influence its use in certain reaction conditions.
• Purity: For pharmaceutical applications, high purity is essential, with specifications often exceeding 95% and frequently reaching 99%.

The presence of the chiral center at the alpha-carbon means that 3-Chlorophenylglycine can exist as enantiomers (R and S forms) or as a racemic mixture (DL-form). The racemic mixture is commonly encountered in bulk chemical supply.

Synthesis Pathways and Considerations

The synthesis of 3-Chlorophenylglycine can be achieved through several organic chemistry routes. A common starting point involves precursors that contain the 3-chlorophenyl moiety and can be functionalized to introduce the amino and carboxylic acid groups. Some general approaches include:

• From 3-Chlorobenzaldehyde: This aldehyde can be a precursor in pathways leading to the amino acid. Reactions might involve amination and subsequent oxidation or other functional group transformations.
• From 2-(3-Chlorophenyl)-2-oxoacetic acid: This alpha-keto acid can be subjected to reductive amination or transamination reactions to yield the desired amino acid.
• From amino(3-chlorophenyl)acetonitrile: Hydrolysis of the nitrile group followed by appropriate transformations can also lead to the formation of the amino acid.

Manufacturers often optimize these routes for yield, purity, cost-effectiveness, and environmental impact. The choice of synthesis method depends on the availability of raw materials, desired scale of production, and specific purity requirements. For bulk purchasing, understanding the synthesis route can sometimes provide insights into potential impurities and their control.

Why Manufacturers and Researchers Value It

The unique structural features of 3-Chlorophenylglycine make it a sought-after intermediate for several reasons:

• Versatility: Its dual functionality (amino and carboxylic acid) allows it to participate in peptide bond formation and other condensation reactions, making it a flexible building block.
• Pharmaceutical Relevance: Its established role in synthetic penicillin production and as a tool in drug discovery SAR studies drives consistent demand.
• Chiral Potential: While often supplied as a racemate, enantiomerically pure forms can be valuable for synthesizing stereospecific drugs.

For manufacturers looking to supply this compound, efficient and scalable synthesis methods are key. For researchers, understanding its properties is essential for designing experiments and interpreting results. Whether you are looking to buy in bulk or research its applications, 3-Chlorophenylglycine (CAS 7292-71-9) remains a compound of significant interest in the chemical landscape.