Introduction
Boc-L-Alanine (CAS No. 15761-38-3) is a widely used protected amino acid derivative in peptide chemistry, pharmaceutical research, and organic synthesis. It is the N-Boc protected form of L-alanine, where the amino group is protected by a tert-butoxycarbonyl (Boc) group. This protection prevents unwanted reactions during multi-step chemical synthesis, making Boc-L-Alanine an essential intermediate for producing peptides, biologically active compounds, and pharmaceutical ingredients.
Its excellent stability, ease of deprotection under acidic conditions, and compatibility with modern peptide synthesis techniques have made Boc-L-Alanine a preferred reagent in research laboratories and industrial manufacturing.
What is Boc-L-Alanine?
Boc-L-Alanine is a protected derivative of the naturally occurring amino acid L-alanine. The Boc protecting group temporarily blocks the amino functionality, allowing chemists to selectively perform reactions on other parts of the molecule during peptide synthesis. Once the desired reactions are complete, the Boc group can be removed to regenerate the free amino group for further coupling reactions.
Because of these characteristics, Boc-L-Alanine plays a significant role in both laboratory-scale research and commercial pharmaceutical production.
Chemical Information
| Property | Value |
|---|---|
| Product Name | Boc-L-Alanine |
| CAS Number | 15761-38-3 |
| Molecular Formula | C₈H₁₅NO₄ |
| Molecular Weight | 189.21 g/mol |
| Chemical Name | N-(tert-Butoxycarbonyl)-L-alanine |
| Appearance | White to off-white crystalline powder |
| Melting Point | Approximately 78–85°C |
| Storage | Store in a cool, dry place (typically 2–8°C recommended) |
Key Features of Boc-L-Alanine
Boc-L-Alanine offers several advantages that make it valuable in chemical and pharmaceutical applications:
- High chemical purity suitable for research and industrial synthesis
- Excellent stability during storage and handling
- Effective amino group protection during peptide synthesis
- Easy removal of the Boc protecting group under acidic conditions
- Compatible with both solid-phase and solution-phase peptide synthesis
- Reliable intermediate for complex organic synthesis
Applications of Boc-L-Alanine
Peptide Synthesis
The primary application of Boc-L-Alanine is in solid-phase peptide synthesis (SPPS) and solution-phase peptide synthesis. It serves as a protected amino acid building block that enables precise formation of peptide bonds while minimizing side reactions.
Pharmaceutical Manufacturing
Pharmaceutical companies use Boc-L-Alanine during the development of peptide-based drugs, active pharmaceutical ingredients (APIs), and therapeutic compounds where controlled amino acid protection is essential.
Organic Synthesis
Organic chemists employ Boc-L-Alanine as an intermediate for synthesizing amino acid derivatives, heterocyclic compounds, and other specialty chemicals used in medicinal chemistry.
Biochemical Research
Research laboratories use Boc-L-Alanine in protein engineering, enzyme studies, and biochemical investigations requiring protected amino acid derivatives.
Why Use Boc Protection?
The Boc (tert-butoxycarbonyl) group is one of the most widely used amino-protecting groups because it provides:
- High stability under neutral and basic reaction conditions
- Easy removal using mild acidic reagents
- Reduced risk of unwanted side reactions
- Improved control over multi-step synthesis
- High efficiency during peptide chain assembly
These advantages significantly improve the success rate of peptide synthesis and pharmaceutical manufacturing processes.
Storage and Handling
To maintain product quality and stability:
- Store in tightly sealed containers.
- Protect from moisture and direct sunlight.
- Keep at recommended refrigerated temperatures when specified.
- Handle using appropriate laboratory safety procedures and personal protective equipment.
Proper storage ensures long-term stability and consistent performance during synthesis.
Industries That Use Boc-L-Alanine
Boc-L-Alanine is widely used across multiple industries, including:
- Pharmaceutical manufacturing
- Biotechnology
- Chemical research laboratories
- Peptide synthesis companies
- Academic research institutions
- Fine chemical manufacturing
Its versatility makes it one of the commonly used protected amino acid intermediates in modern chemical synthesis.
Conclusion
Boc-L-Alanine (CAS No. 15761-38-3) is an indispensable protected amino acid used extensively in peptide synthesis, pharmaceutical development, and organic chemistry. Its stable Boc protecting group, excellent handling properties, and compatibility with advanced synthesis techniques make it a trusted building block for researchers and manufacturers worldwide.
Whether developing peptide therapeutics, conducting biochemical research, or synthesizing complex organic molecules, Boc-L-Alanine delivers the reliability and performance required for high-quality scientific and industrial applications.
